The U.S. military has shot down an unspecified number of drones fired by Iran targeting Israel, according to a defense official.

Iran launched a significant number of drones and missiles toward Israel on Saturday in retaliation for an Israeli airstrike that killed a senior Iranian military leader at the Iranian Consulate in Damascus, Syria. The attack, which Iranian leaders had threatened to carry out since the April 1 strike, is ongoing as of Saturday night and into the early hours of Sunday.