OMON took part in the Second Chechen War as well. OMON forces sustained severe losses in the conflict, including from the March 2000 ambush which killed scores of servicemen from Berezniki and Perm (including nine captured and executed), the July 2000 suicide bombing which killed at least twenty-five Russians at Argun base of OMON from Chelyabinsk, and the April 2002 mine attack which left twenty-one Chechen OMON troops dead in central Grozny. Control and discipline continued to be questionable in Chechnya, where OMON members were known to have engaged in, or fallen victim to, several deadly incidents of friendly fire and fratricide. In perhaps the bloodiest of such incidents, at least twenty-four were killed when OMON from Podolsk attacked a column of OMON from Sergiyev Posad in Grozny on 2 March 2000. Among other incidents, several Chechen OMON servicemen were abducted and executed in Grozny by Russian military servicemen in November 2000, members of Chechen OMON engaged in a shootout with the Ingush police on the border between Chechnya and Ingushetia resulting in eight fatalities in September 2006, and Ramzan Kadyrov-controlled local OMON clashed with a group of rival Chechens belonging to the Kakiyev's Spetsnaz GRU military unit in Grozny, resulting in at least five being killed in 2007.