Chechnya bombing kills 5 officers

• State-run news says officers were operating metal detectors outside concert hall


• "Suspicious young man" blew himself up when cops approached him


• It was not clear whether bomber survived explosion

(CNN) -- Five police officers were killed Sunday in a terror attack in Chechnya, according to Russian state news.

RIA Novosti said 12 others -- including four officers -- were injured in the attack Sunday evening outside a concert in the capital city of Grozny.

Police operating metal detectors set up outside a concert hall noticed a "suspicious young man," the agency said, and "when police officers decided to inspect and identify him, he blew himself up."

The Russian Interior Ministry's press service identified the man as Opti Mudarov, a 19-year-old native of Grozny, and said he had "not been seen by his relatives since he left home two months ago."

It was not immediately clear whether the bomber survived the blast.

Chechnya, a mostly Sunni Muslim republic of more than 1.2 million in Russia's North Caucasus region, has been engaged in bloody conflict with Russia for decades.

CNN's Arkady Irshenko contributed to this report.