By "El Huaso" for Borderland Beat Six Guardia Civil police officers were injured after their convoy was ambushed by gunmen in Zamora, Michoacán this afternoon.  The attack occurred in the community of Estancia de Amezcua in Zamora, where armed civilians attacked officers while on patrol late in the morning of May 22nd. The shootout lasted several minutes. Six police officers were injured, four of them seriously, and another civilian was hit by a stray bullet.