U.S. private equity firm Cerberus Capital Management said on Tuesday it will immediately begin selling its investment in gunmaker Freedom Group in light of last week's school shooting in Connecticut.

Cerberus acquired Bushmaster in 2006 and later merged it with other gun companies to create Freedom Group, which reported net sales of $677.3 million for the nine months ending September 2012, up from $564.6 million in the same period a year ago.