MOSCOW, April 9 (RIA Novosti) - Two traffic police officers were wounded after gunmen opened fire on them late Wednesday in Russia's North Caucasus republic of Daghestan, a police source said on Thursday.

The source said that at around midnight traffic police stopped a BMW car near a gas station on the Kavkaz federal highway for a routine document check.

"The driver and his passenger opened fire on the police officers wounding two of them. After that they abandoned their car and fled," the source said.

He added that the assailants also killed a farmer, when they ran onto his land while trying to escape from the police.

Sporadic terrorist attacks and militant clashes are common in Daghestan, and in neighboring Chechnya, although the Kremlin has officially ended its military campaign to fight separatists and terrorists there.