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Iranian friends and relatives of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, react inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)

Iranian friends and relatives of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, react inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
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Iranian friends and relatives of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, react inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)

Iranian friends and relatives of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, react inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
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An Iranian relative of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, reacts inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)

An Iranian relative of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, reacts inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
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TEHRAN, IRAN - JANUARY 14: Relatives of Panamanian-flagged, Iranian owned oil tanker Sanchi's crewmen, who were aboard Sanchi as it collided with the Hong Kong-flagged cargo ship CF Crystal in China's sea on January 6, react following news of its sinking at Iran's International Oil Tanker Central building in Tehran, Iran on January 14, 2018. (Photo by Fatemeh Bahrami/Anadolu Agency/Getty Images)

TEHRAN, IRAN - JANUARY 14: Relatives of Panamanian-flagged, Iranian owned oil tanker Sanchi's crewmen, who were aboard Sanchi as it collided with the Hong Kong-flagged cargo ship CF Crystal in China's sea on January 6, react following news of its sinking at Iran's International Oil Tanker Central building in Tehran, Iran on January 14, 2018. (Photo by Fatemeh Bahrami/Anadolu Agency/Getty Images)
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An Iranian relative of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, reacts inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)

An Iranian relative of the oil Tanker crewmen, who were aboard it when it collided with a cargo ship off China eight days ago, reacts inside Iran's International Oil Tanker Central building in the capital Tehran following news of its sinking, on January 14, 2018. A Iranian oil tanker burst into flames from end to end and sank, state media said. A Tehran official said even before news of the sinking that there was no hope of saving some 30 missing crewmen. But Chinese officials played down fears of a major environmental disaster. The Sanchi, carrying 136,000 tonnes of light crude oil from Iran, had been in flames since colliding with the CF Crystal, a Hong Kong-registered bulk freighter, on January 6. / AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
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