Moscow: At least eight people including six policemen were killed and 22 injured in two suicide attacks in the Chechen capital Grozny, in Russia's restive Caucasus region, officials said.

The attacks took place during the Eid celebrations to mark the end of the Muslim fasting month of Ramadan, a news agency reported.

A man blew himself up when a police patrol tried to detain him near the local parliament building while the second blast happened just 30 minutes later. There were unconfirmed reports of a third blast.

Chechnya's pro-Moscow leader Ramzan Kadyrov said the attackers had "shown their real faces" by choosing "the most sacred day for all Muslims".

Moscow has been fighting insurgents in the North Caucasus since the 1991 collapse of the Soviet Union, waging a war in 1994-1996 against separatist rebels in Chechnya.

After a second war in Chechnya in 1999, the rebellion aimed imposing an Islamic state in the region.

Even though the war ended in 2000, the rebels have waged an increasingly deadly insurgency, with the unrest spreading into other areas of the North Caucasus.