A suicide bomber blew himself up in the capital of Russia's restive Chechnya today, outside a theater where the region's Kremlin-appointed president was waiting for a concert to begin, AP quoted officials as saying. Chechen President Ramzan Kadyrov, a former separatist rebel who switched sides to support Russia, was not injured. But the Investigative Commission, Russia's top investigative body, said five police officers and two civilians were wounded in the blast. The explosion, at about 6 p.m., shook the center of Grozny, a city gingerly trying to come back to life after being devastated in two wars between separatists and Russian forces since 1994. Kadyrov's office said in a statement that police guarding the theater noticed a man behaving suspiciously and that when they shouted at him, he detonated an explosive device.