(Repeats to additional subscribers) KABUL, April 30 (Reuters) - U.S.-led coalition troops have killed scores of Taliban fighters in Afghanistan over the past several days, the coalition said on Monday. Backed by air support, the Taliban were killed in two separate battles in the western province of Herat, which lies near the border with Iran and has been relatively safer until recently compared to the southern and eastern areas where the Taliban are largely active, it said in a statement.