A gunfight between Mexican troops and gunmen interrupted a church service in northwestern Mexico, with shots ringing out as a priest told worshippers to close the doors and stay inside. The shooting happened Sunday in Los Mochis, a city in the western state of Sinaloa, after members of Mexico’s National Guard came under fire from a group of gunmen, according to state security officials. Video from inside a church showed a priest delivering his sermon when several gunshots were heard nearby, startling people in the congregation. Article continues below the playerMore shots were heard after the doors were closed, turning the church into a temporary shelter. “We’re going to remain silent and listen to see if the shots have stopped,” the priest said.