The top Democrat on the House Foreign Affairs Committee said Wednesday that he's going to block a proposed sale of $2.8 billion in heavy weaponry to Israel over concerns that the powerful bombs may not be used in line with U.S. and international law.

Rep. Gregory Meeks of New York said he would withhold approval for the sale because of "grave, unresolved concerns" about how these munitions could be used in densely populated areas of Gaza and Lebanon by Israeli Prime Minister Benjamin Netanyahu's government.