It's hard to know what's happening on the ground inside Raqqa. Since ISIS took over, the city has become increasingly isolated -- with an activist group known as Raqqa is Being Slaughtered Silently providing outsiders with a harrowing glimpse of the city's transformation.
On Sunday, the activist collective said that the city appeared to be bracing for an attack even before the French airstrikes began.
ISIS fighters in Raqqa had expected retaliatory airstrikes and evacuated key facilities, including their headquarters, operation and security buildings, a member of Raqqa is Being Slaughtered Silently said.
Streets were empty, the activists said, markets were less crowded than usual and sheikhs in mosques said they expected the city to be struck.
The airstrikes hit several key ISIS facilities, including the city's stadium, activists said, used by ISIS as both its headquarters and a jail. It was not immediately clear what the damage was. So far, according to Raqqa is Being Slaughtered Silently, there have been no reports of civilian casualties.
The ISIS media wing Amaaq also said the sites hit by airstrikes had been abandoned and that no one had been killed in the airstrikes. CNN has not independently confirmed the groups' reports.
ISIS in Raqqa was previously the target of retaliatory airstrikes in February. Two days after news emerged that the group had burned a captive Jordanian pilot to death, the Middle Eastern nation hit back. At the time, ISIS posted photos of the destruction from the Jordanian airstrikes and the activist Syrian Observatory for Human Rights said 10 militants were killed.
Inside Syrian town living under reign of fear
CNN's Sandrine Amiel, Raja Razek, Pierre Meilhan and Mohammed Tawfeeq contributed to this report.