At three people, including a police officer, were killed in a shootout at a traffic checkpoint in Russia's North Caucasus region of Ingushetia on Sunday, a media report said.Citing a national anti-terrorism committee statement, Interfax news agency said two assailants attacked the traffic checkpoint at around 5:30 p.m. Moscow time (1430 GMT) and they were killed in an exchange of fire, Xinhua news agency reported.No civilians were hurt during the armed clash.The North Caucasus region is a hotbed of insurgency with separatists and extremists frequently attacking the governmental, military and police facilities as well as civilians.