Colombia's leftist FARC rebel force formally completed its disarmament process on Monday to end half a century of war against the state, the United Nations said.

UN monitors "today stored away the entirety of the FARC's registered individual arms," except for some that were exempted for transitional security at demobilization camps, the body said in a statement.

The move carried out by Colombia's biggest rebel group under a 2016 peace accord brings Latin America's oldest civil conflict close to a complete end.