Nearly 40 pro-regime fighters were killed in overnight strikes in Syria, said the Syrian Observatory for Human Rights on Monday. The regime blamed the US-led coalition fighting ISIS for the strike in the eastern town of al-Hari, which is controlled by pro-Damascus fighters. The alliance has denied the charge. "No member of the US-led coalition carried out strikes near Albu Kamal," Major Josh Jacques, a US Central Command spokesman, told Reuters. "Thirty-eight non-Syrian fighters from regime loyalist militias were killed in the night-time raid on al-Hari, on the Syrian-Iraqi border," said Observatory head Rami Abdel Rahman. The Britain-based monitor said unidentified planes had struck Lebanons “Hezbollah” and other allied foreign militias around Albu Kamal. Abdel Rahman could not give any further details on their nationalities, but there are Iraqi, Iranian, and even Afghan fighters stationed in the area. In Baghdad, Iraqi officials said Popular Mobilization Forces came under attack south of the town of Qaim, just across the border from Albu Kamal. They said 20 fighters were killed and dozens were wounded, adding that the cause of the attack was not immediately clear. The Iraqi officials spoke on condition of anonymity because they were not authorized to speak to the media. Asked about the air strikes, an Israeli military spokeswoman said: "We do not comment on foreign reports." Syrian regime media reported the attack overnight, citing a military source and accusing the US-led coalition of carrying it out. It said several people were killed and wounded but did not give a specific number or their nationalities. Last month a dozen pro-regime fighters were killed in an air strike on Syrian regime positions that the Observatory and state media blamed on the coalition. The Pentagon denied responsibility. In February US-led coalition air strikes killed at least 100 pro-regime fighters in Deir Ezzor province, including Russians. "The strike on Al-Hari produced the highest death toll for regime forces since the February incident," the Observatorys chief Abdel Rahman told AFP. More than 350,000 people have been killed since Syrias conflict erupted in 2011 with protests against the regime.