Relatives of the victims watch as police investigators inspect the crime scene following a targeted attack on a bus in the town of San Luis Talpa, 38 km south of San Salvador, on May 23, 2014. Six people were shot dead and four wounded in a suspected gang attack on a bus near El Salvador's international airport on Friday, police said. Homicides in this Central American country were running at 14 per day until a truce was reached between the two main gangs in March 2012, which helped halve the murder rate. But extortion and other crimes persist. The notorious "mara" street gangs are believed have around 60,000 members, 10,000 of whom are behind bars.  AFP PHOTO/Jose CABEZAS        (Photo credit should read JOSE CABEZAS/AFP/Getty Images)