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The Archbishop of Colombo, Cardinal Malcolm Ranjith (C), arrives to attend a vigil in memory of the bomb blast victims in Colombo on April 28, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by Jewel SAMAD / AFP) (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

The Archbishop of Colombo, Cardinal Malcolm Ranjith (C), arrives to attend a vigil in memory of the bomb blast victims in Colombo on April 28, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by Jewel SAMAD / AFP)        (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

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Ahmedabad's Bishop, Rethana Swamy (C) with other Christians, participate in a peace march to show solidarity with the Sri Lankan victims of the last week's serial bombings in Ahmedabad on April 28, 2019. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by SAM PANTHAKY / AFP) (Photo credit should read SAM PANTHAKY/AFP/Getty Images)

Ahmedabad's Bishop, Rethana Swamy (C) with other Christians, participate in a peace march to show solidarity with the Sri Lankan victims of the last week's serial bombings in Ahmedabad on April 28, 2019. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by SAM PANTHAKY / AFP)        (Photo credit should read SAM PANTHAKY/AFP/Getty Images)

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Mourners light candles during a vigil in memory of the bomb blast victims in Colombo on April 28, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by Jewel SAMAD / AFP) (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

Mourners light candles during a vigil in memory of the bomb blast victims in Colombo on April 28, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by Jewel SAMAD / AFP)        (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

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A Sri Lankan Special Task Force (STF) soldier checks a Muslim burial ground in Colombo on April 29, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by ISHARA S. KODIKARA / AFP) (Photo credit should read ISHARA S. KODIKARA/AFP/Getty Images)

A Sri Lankan Special Task Force (STF) soldier checks a Muslim burial ground in Colombo on April 29, 2019, a week after a series of bomb blasts targeting churches and luxury hotels on Easter Sunday in Sri Lanka. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by ISHARA S.  KODIKARA / AFP)        (Photo credit should read ISHARA S.  KODIKARA/AFP/Getty Images)

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Indian Christians put candles in the formation of Sri Lanka's map after participating in a peace march to show solidarity with the Sri Lankan victims of the last week's serial bombings in Ahmedabad on April 28, 2019. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by SAM PANTHAKY / AFP) (Photo credit should read SAM PANTHAKY/AFP/Getty Images)

Indian Christians put candles in the formation of Sri Lanka's map after participating in a peace march to show solidarity with the Sri Lankan victims of the last week's serial bombings in Ahmedabad on April 28, 2019. - Sri Lanka's churches remained shut on April 28 forcing Christians to say prayers of grief in private over the Easter suicide attacks that the country's Roman Catholic leader called "an insult to humanity". (Photo by SAM PANTHAKY / AFP)        (Photo credit should read SAM PANTHAKY/AFP/Getty Images)