on-Don, Oct 1, SPA -- Suspected rebels opened fire with automatic weapons on a patrol of Russian troops and local police in the region surrounding the Chechen capital Grozny, killing two servicemen and wounding two others, the Interior Ministry said Saturday. Two suspected militants also died in Friday's clash, the ministry's regional branch said. In another armed incident, federal forces on Friday discovered a rebel base in the southeastern mountains with a large weapons cache including grenades and a machine-gun and shot dead a suspected Chechen insurgent, the Associated Press quoted interior ministry as saying.