ISIS claimed responsibility on Tuesday for an attack in eastern Syria that killed two Syrian army soldiers, the militant group's first deadly operation against the Syrian government since February.
Monday's attack in the eastern province of Hasakah points to the lingering threat posed by ISIS as President Ahmed al-Sharaa seeks to consolidate government authority over the country, nearly 1-1/2 years after he ousted Bashar al-Assad.
The Syrian state news agency SANA reported on Monday that two Syrian army soldiers were killed and others wounded in an attack by unknown assailants on a bus in the Hasakah countryside, Reuters reported.
ISIS, in a brief statement posted on its Amaq News Agency, said its fighters had killed and wounded six members of "the apostate Syrian army" during an ambush in the same area.
ISIS controlled around a quarter or more of Syria at the peak of its power during the Syrian civil war a decade ago, before it was beaten out of the territory by a US-led coalition and other foes.
The Syrian government under Sharaa last year joined the US-led coalition to combat ISIS.
ISIS in February declared a new phase of operations against Sharaa's government, and carried out a spate of attacks including one that killed four Syrian government security personnel near Raqqa city.
