Video purports to show destruction following airstrikes in Syria

Footage obtained by Reuters purportedly shows the aftermath of U.S.-led airstrikes on Islamic State targets in Syria.

In the video, a man is heard saying “Allah Akbar,” or “God is great,” as he surveys the wreckage in the northern town of Idlib. Other residents are seeing picking through the debris.

The Syrian Observatory for Human Rights said most of those killed in the Idlib region – home to the Nusra front, an al-Qaida affiliate – had been non-Syrians.

The strikes by the U.S. and five Arab allies – Bahrain, Qatar, Saudi Arabia, Jordan, and the United Arab Emirates – hit Islamic State targets on Monday night around the city of Raqqa, the militant group's self-declared capital in Syria. In a video released by the U.S. Navy, Tomahawk missiles are seen being launched from the U.S.S. Philippine Sea against Islamic State targets.

Rami Abdurrahman, a human rights activist, told the AP, “There is confirmed information that there are casualties among Islamic State group members."

The military campaign also included strikes on "seasoned al Qaeda veterans" known as the Khorasan Group, according to U.S. Central Command.

Attorney General Eric Holder told Yahoo Global News Anchor Katie Couric that the group was "getting close to an execution date of some of the plans that we have seen."

"And the hitting that we did last night, I think, will probably continue until we are at a stage where we think we have degraded their ability to get at our allies or to the homeland," he said.