Police in Chechnya say two militants blew themselves up to escape capture, wounding three policemen and three civilians in the process, AP reported.
It is the second suicide bombing this week in Chechnya and part of a rising wave of violence in Russia's North Caucasus.
Chechen Interior Ministry spokesman Magomed Deniyev said Friday that police blockaded the two militants in a house in the town of Shali overnight. He said when police demanded they give themselves up, the militants opened fire and then set off explosives attached to their bodies.
Deniyev said three policemen and three civilians were hospitalized with shrapnel wounds.
Separatist rebels and Russian troops have fought two full-scale wars in Chechnya over the past 15 years, and small clashes persist.