BAGHDAD, April 2 (Reuters) - The bodies of 19 civilians kidnapped by gunmen at a fake checkpoint north of Baghdad were found on Monday, Iraqi police and hospital sources said. They said all had been shot in the head and chest in one of the biggest mass kidnappings in months. Gunmen kidnapped the civilians, men from a Shi'ite village near the city of Baquba, after stopping cars at a fake checkpoint on Sunday. The bodies were found not far from Baquba, which lies 65 km (40 miles) north of Baghdad. Gunmen also kidnapped 14 policemen near Baquba, the provincial capital of Diyala province, a month ago. They were later found dead. Diyala is home to Shi'ites, Sunni Arabs and Kurds and has been the scene of relentless bloodshed.