At least nine Syrian troopers and 31 allied fighters were killed in Israeli night raids targeting arms depots and military positions in eastern Syria
A monitor termed the strikes as the deadliest raids since 2018.
According to the AFP, the Israeli air force carried out more than 18 strikes against multiple targets in an area stretching from the eastern town of Deir Ezzor to the Iraqi border, the Syrian Observatory for Human Rights said.
The raids killed nine Syrian troopers and 31 foreign militia fighters whose nationalities were not immediately known, the Britain-based monitoring group said.
Paramilitaries belonging to the Lebanese Hezbollah movement and the Fatimid Brigade, which is made up of pro-Iranian Afghan fighters, operate in the region, the Observatory said.
The Israeli military did not immediately comment.
Observatory head Rami Abdul Rahman called the Israeli raids the “deadliest since June 2018” when strikes on the same region killed at least 55 pro-government fighters, including Iraqis as well as Syrians.
The latest raids came hours after separate strikes near the Iraqi border on Tuesday killed at least 12 Iran-backed militia fighters.
The Observatory said it could not identify the warplanes responsible for the earlier strikes.
The Syrian state news agency SANA reported Wednesday’s raids but gave few details.
“At 1:10 am (2310 GMT Tuesday), the Israeli enemy carried out an aerial assault on the town of Deir Ezzor and the Albu Kamal region,” SANA said, citing a military source.