"We have confirmed reports that ISIS members took a (non-Syrian) Arab pilot prisoner after shooting his plane down with an anti-aircraft missile near Raqqa city," the Syrian Observatory for Human Rights said.
The ISIS branch in Raqqa published photographs on jihadist websites purporting to show its fighters holding the captured pilot, with a caption identifying him as Jordanian.
Another group, the Raqqa Media Center, that covers areas under IS control in Raqqa reaffirmed the claim that the pilot is Jordanian, and Al Jazeera reported similar claims.
The US-led coalition has carried out hundreds of airstrikes against IS positions in Syria since Sept. 23.
Saudi Arabia, Jordan, Bahrain and the United Arab Emirates have joined in airstrikes against the extremist group, while Qatar is providing logistical support.
AFP, AP and Reuters contributed to this report