A shootout between police and gunmen wounded at least three officers on Thursday and forced the evacuation of nearby schools in Tijuana, across the US border from San Diego, an official said. Soldiers, state and local police were sent in to help control the three-hour confrontation that began when federal agents tried to raid a house in a district of Tijuana near the border, said an official with state prosecutors who was not authorized to be quoted by name. It was not clear if people inside the house were wounded. The official said three schools close to the shootout were evacuated and five blocks were cordoned off. Television images showed trucks and soldiers in the street, and police rushing small children out under armed guard.