GROZNY, July 14 (RIA Novosti) - Two police officers were injured overnight, when armed militants attacked them in a drive-by shooting in Russia's North Caucasus Republic of Chechnya, a police source said on Monday.

The officers, who were in a police vehicle, were injured when the unknown gunmen opened fire with assault rifles from a Lada car, near the republic's capital Grozny late on Sunday.

"After the shots were fired, the police vehicle overturned in a ditch," the source said.

Both of the injured have been hospitalized, a search for the attackers is underway.