The United States military reported that militants killed in two airstrikes in Syria during September were affiliated with the extremist "Islamic State" group and an al-Qaeda-linked faction.

Thirty-seven Islamist militants affiliated with the extremist "Islamic State" (IS) group and an al-Qaeda affiliate called Hurras al-Din were killed in two airstrikes in Syria this month, according to a statement by the US military on Sunday.

The US Central Command (CENTCOM) announced via X that the airstrikes occurred on September 16 and September 24, noting that there was no indication of civilian casualties.

The September 24 airstrike targeted and killed nine "terrorist operatives," including a senior leader of Hurras al-Din in northwestern Syria. The senior leader was responsible for overseeing the group's military operations, according to the US military.

Earlier, on September 16, a "large-scale airstrike" was carried out on an IS training camp in a remote, undisclosed part of central Syria. This strike killed at least 28 militants, among them four senior leaders.

The CENTCOM statement emphasized that the airstrikes aimed to disrupt IS's capacity to conduct operations against US interests and those of its allies and partners. The statement used "ISIS," another term for the "Islamic State."

There are currently around 900 US troops stationed in Syria, along with an undisclosed number of contractors. Their primary mission is to prevent the resurgence of the IS group, which had gained control of large parts of Iraq and Syria in 2014.

US forces in Syria are also working with their main allies, the Kurdish-led Syrian Democratic Forces, in the northeastern part of the country. This region is not far from areas where Iranian-backed militant groups operate, including a key border crossing with Iraq.