Chechen President Alu Alkhanov said Monday authorities were investigating whether federal forces opened fire without provocation on a car in Chechnya, killing five people, including two presidential security officers. Alkhanov said on Chechen state television that the gunfire apparently came from an armored personnel carrier assigned to a checkpoint between the village of Kurchaloi and Geldagan. The attack happened near the checkpoint Friday, he said. \"It does not matter to the population of the republic of Chechnya who has perpetrated this crime -- guerrillas or people wearing shoulder straps,\" Alkhanov said in televised remarks. \"Crimes committed by the latter deliver a heavier blow to the Chechen people because they hope for their protection.\" Alkhanov said the gunmen did not ask the passengers to produce any identification or make any other demands, although it was not immediately clear how he would know that. (AP)