Airstrikes overnight in western Syria killed at least 14 people and injured dozens of others, Syria’s state news media and an independent organization reported on Monday, in what appeared to be one of the deadliest waves of attacks in the country in months.

The Syrian state-run news agency, SANA, attributed the attack near the city of Masyaf to Israel. It quoted Fayssal Haidar, the director of a hospital in Masyaf, who said that 43 people had been wounded, including six who were in critical condition.

Israel’s military did not immediately respond to a request for comment on the strikes.

The Syrian Observatory for Human Rights, a Britain-based group that tracks the war in Syria, said on Sunday that strikes had hit the area of a scientific research institute in Masyaf. It later said that 18 people had been killed, including eight Syrian combatants and four civilians. It was not possible to confirm the report independently.

In the past, Israel has acknowledged carrying out hundreds of assaults on targets in Syria that it says are linked to Iran. A series of airstrikes in March near the northern Syrian city of Aleppo killed at least 44 people, including 36 Syrian soldiers and seven members of Hezbollah, the powerful Lebanese militia backed by Iran, the observatory said.

The government in Tehran supports and arms a network of proxy militias that have been fighting with Israel, including Hezbollah, Hamas and the Houthi militia in Yemen.

Israel and Iran have for decades fought a clandestine war, but attacks across borders have escalated since Israel’s military offensive in Gaza began in response to last October’s Hamas-led attack.

Rawan Sheikh Ahmad and Hwaida Saad contributed reporting.