Thirteen killed in execution-style raid on Tijuana drug rehab center
Masked gunmen forced residents onto the floor at El Camino a la Recuperacion center and then sprayed them with bullets, officials said.
Officials have not announced a motive for the killings, but Mexico is gripped in a bloody war among drug cartels.
A total of 28,228 people have died in Mexico in drug-related war deaths, and Mexican President Felipe Calderon has ordered about 45,000 troops to 18 states where drug trafficking organizations are battling for access to the U.S. market.
Earlier this month in Ciudad Juarez, 14 people were gunned down at a family birthday party. The border city has become the epicenter of Mexico's drug war.
-- Tony Perry in San Diego
Photo: Members of the Mexican Federal Police stand guard in front of the rehab center in Tijuana, where gunmen shot 13 people to death. Credit: Francisco Vega / AFP/Getty Images