(JTA) – Russia accused Israel of striking an air base in central Syria that killed 14, and two unnamed U.S. officials reportedly confirmed that it was Israel that carried out the attack. Iranian nationals were among those killed in the early Monday morning missile strikes, according to reports. The strikes came less than two days after a chemical weapons attack in the rebel-held Syrian town of Douma, for which both the United States and France threatened to retaliate. At least 40 people have died in the chemical weapons attack. NBC on Monday quoted the U.S. officials as saying that Israel had carried out the attack, and that Washington had been notified in advance.

Syria first blamed the United States for the attack on the air base, which the U.S. denied. After Russia accused Israel, Syrian state media quoted the military saying that it was Israeli F-15 war planes that had carried out the strikes. “The Israeli aggression on the T4 airport was carried out with F-15 planes that fired several missiles from above Lebanese land,” state news agency SANA said. The Tiyas, or T4, military air base reportedly has been in use most recently by Iran-backed forces. Israel, as is its standing policy, has neither confirmed nor denied involvement in the attack.