Islamic State fighters shot down a warplane believed to be from the U.S.-led coalition over Syria on Wednesday and captured its pilot, activists said.

The Britain-based Syrian Observatory for Human Rights said the aircraft was shot down near the northern city of Raqqa, the Islamic State group's de facto capital. The Observatory said the warplane was part of the U.S.-led coalition, adding that the captured pilot is an Arab.

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Another group, the Raqqa Media Center (RMC), that covers areas under ISIS control in Raqqa claimed that the pilot is Jordanian.

If true, it will be the first warplane shot down by ISIS since the U.S.-led coalition began its airstrikes against the group in Syria three months ago.

RMC published a photograph said to be of the pilot who appeared wearing a white shirt as he was surrounded by 11 fighters, some of them masked. Another photograph published by the group showed the man — naked from the waist down and soaking wet — being captured by three gunmen as he was taken out of what appeared to be a lake.

These images appeared on JustPasteIt and were not independently confirmed by Mashable.

Image: Islamic State

Image: Islamic State

Image: Islamic State

Jordanian authorities reportedly confirmed one of its pilots was missing.

In Washington, a Pentagon official said they are aware about the claims being made over social media that a pilot has been shot down, but they could not confirm the report at this time.

The official said any further questions about the alleged capture should be referred to the government of Jordan. He spoke on the condition of anonymity because he was not authorized to discuss the reports by name.

The U.S.-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.