The authorities in Mexico say they believe they have found the bodies of two officials investigating the killing of 72 foreign migrants

Prosecutor Roberto Suarez Vazquez and Juan Carlos Suarez Sanchez, a top security official, went missing recently in the state of Tamaulipas. Identification documents found with the bodies near the town of San Fernando matched those of the two men. The massacre of the migrants has been blamed on a powerful drug cartel. One of two confirmed survivors has said members of the Los Zetas cartel opened fire when they refused to carry out assassinations for them. The 58 men and 14 women were from South and Central America and had been trying to reach the United States. Suarez Vazquez was one of the first people to find the migrants' bullet-ridden bodies at an abandoned ranch near San Fernando. Both he and Suarez Sanchez, the head of the local Public Security department, were investigating the killings, but disappeared the following day. Officials feared that they had been abducted. Then a couple of weeks later, two bodies were found in a field about 30 miles north-east of San Fernando. The Tamaulipas state attorney-general's office said identification documents found on the bodies matched those of the missing officials, but that it was conducting DNA tests to confirm the identities.