Insurgents killed 12 Afghan civilians in the east and north _ half in an ambush on a group of truck drivers and half when a van hit a roadside bomb, the government said Monday. Afghanistan's civilian death toll has risen alongside that of U.S. and international forces this summer. A U.N. report issued Saturday said August was the deadliest month of the year for civilians. A total of 1,500 civilians died in Afghanistan from January through August, up from 1,145 for the same period of 2008, the U.N. report was quoted as saying by The Associated Press. On Sunday, Taliban militants ambushed a group of truck drivers in eastern Kunar province, killing six of the drivers and burning their vehicles, the Interior Ministry said in a statement. A seventh truck driver was kidnapped. Also Sunday, a private van hit a roadside bomb in northern Faryab province, the ministry said in a separate statement. Six of those inside were killed and another seven injured, the statement said.