A resident of Chechnya surrendered 120 kg of TNT, grenades and rounds of ammunition to police, a source in the southern Russian republic told RIA Novosti.

"An unemployed resident of the Nadterechnoye village voluntarily surrendered to police a 150-mm shell, three grenades, 50 rounds of ammunition of various calibers as well as 120 kg of TNT dating back to the World War II," the source said.

An investigation is underway.

Sporadic terrorist attacks and militant clashes are common in Russia's mainly Muslim North Caucasus republics, especially Chechnya, Dagestan and Ingushetia.

The Kremlin has pledged to wage "a ruthless fight" against militant groups but also acknowledged a need to tackle unemployment, organized crime, clan rivalry and corruption as causes of the ongoing violence in the region.

Russia has been fighting militants in the North Caucasus for over a decade, including two separatist wars in Chechnya.

MOSCOW, June 15 (RIA Novosti)