Authorities say gunmen have kidnapped the head of kidnapping and organized crime investigations in the Mexican border state of Coahuila.

Coahuila's prosecutor's office says commander Gerardo Valdes was seized Monday by at least six men when he was driving in Saltillo, the state's capital.

The office says that an unidentified man called police Monday and said that Valdes had been grabbed by the Juarez Cartel.

President Felipe Calderon has deployed 25,000 soldiers across the country to battle drug gangs, which have responded with bold attacks on the military and police. More than 4,000 people have been killed in turf wars, assassinations and shootouts since 2005.