MOSCOW - A Moscow newspaper, quoting police sources, said Thursday that a resident of southern Russia is being sought in connection with the suicide bombing Monday that killed 35 people at Moscow's busiest airport.

The Kommersant newspaper said the man being sought for questioning in the Domodedovo Airport bombing was a Russian from Stavropol who belonged to a radical Islamic group called Nogai Jamaat. The person may have helped to organize the bombing, the newspaper said.

Stavropol is a relatively quiet part of the country, but it borders restive Dagestan, a North Caucasus republic where violence is frequent.

Just Wednesday night, four people died and six were injured when a car bomb blew up outside a cafe in the Dagestani town of Khasavyurt, the Interfax news service reported Thursday.

Interfax said, according to its sources, that the man reportedly being sought in the Domodedovo Airport bombing was well-known in southern Russia, because he was suspected of involvement in an Aug. 17 terror attack. In that incident, a car bomb exploded outside a cafe in Pyatigorsk in the Stavropol region, wounding 30 people.

Interfax reported that Stavropol police said they had not been told that the man was thought to be involved in this week's Moscow bombing.

On Wednesday, Prime Minister Vladimir Putin said the Domodedovo attack was not connected to Chechnya, a republic west of Dagestan where Russia fought two civil wars. The region has been the source of previous terrorist attacks.