(Recasts, adds additional information in paras 3-4)
NAZRAN, September 2 (RIA Novosti) - Police are battling gunmen in the city of Karabulak in the North Caucasus Republic of Ingushetia, a source in the republic's interior bodies said Sunday.
"According to preliminary information, a group of militants attacked the city's interior department," the source said.
The sides are using small arms and grenade launchers, the source said.
According to preliminary information, the militants have been blocked in a residential building, the source said.
