On Monday night, the United States and partner nation forces launched airstrikes in Syria. The first person to report those strikes appears to be this Twitter user:
Breaking: Huge explosions shook the city in what might be the beginning of US airstrikes on ISIS HQs in Raqqa
After several of minutes, he tweeted again, saying, "sounds of warplanes can be heard clearly."
The airstrikes 5/6 concentrated near the 'governorate building' ISIS's main HQ. Meanwhile, sounds of warplanes can be heard clearly
Reports of similar airstrikes on Tabga town and brigade 93 in Ein Essa.
A spokesman for the Pentagon officially confirmed the airstrikes on ISIS roughly 30 minutes later:
US military & partner nation forces have begun striking ISIL targets in Syria using mix of fighters, bombers and Tomahawk missiles.
Hariri shared two more tweets, one saying, "The sky is full drones over Raqqa now," before going dark:
The sky is full drones over Raqqa now
Also Tal Abyad, on the Turkish border, was bombed according to activists there