UPDATE 1-Ireland's Ardagh offers to sell U.S. plants due to anti-trust issues
September 20, 2013 at 14:48 PM EDT
DUBLIN, Sept 20 (Reuters) - Ireland's Ardagh Glass offered on Friday to sell four U.S. plants to address anti-trust authorities' objections to its planned $1.7 billion acquisition of an American unit from France's Saint-Gobain.
