Pentagon officials have released photos and video showing strikes on rooftop communications equipment at an Islamic State finance centre in Raqqa, the group's self-declared capital in Syria. Another showed damage to a command-and-control building in the same city. A third showed damage in a residential area along the Syrian-Iraqi border that had been used as a training site for fighters.

US airstrikes ISIS
Pictures show an IS Command and Control Centre in Syria before (L) and after it was struck by bombs dropped by a US F-22 fighter jet. This was the first time an F-22 was used in a combat roleReuters
US airstrikes ISIS
A still image taken from video provided by the US Central Command shows a damaged building at an Islamic State (IS) compound near the northern Syrian town of Raqqa, following an air strikeReuters
US airstrikes ISIS
An area US officials say was an IS vehicle staging centre near Abu Kamal, Syria, is seen before (inset) and after it was struck by US aircraftReuters
US airstrikes ISIS
A man rides his bike past a communications tower in the Syrian city of Raqqa that was destroyed after a US drone crashed into it, according to ISAFP
US airstrikes ISIS
A fighter from the Islamic State group holds a piece of what IS says is a US drone that crashed into a communications tower in RaqqaAFP
ISIS missile
Pictures show what US officials say was an Isis finance centre in Syria before (L) and after it was struck by a Tomahawk missileReuters

The US and five Arab nations attacked the Islamic State group's headquarters in eastern Syria in night-time raids using land and sea-based US aircraft as well as Tomahawk cruise missiles launched from two Navy ships in the Red Sea and the northern Persian Gulf.

Saudi Arabia, Bahrain, the United Arab Emirates and Jordan have confirmed they participated in the strikes. Qatar played a supporting role.

ISIS missile
The guided-missile cruiser USS Philippine Sea launches a Tomahawk cruise missile in the Arabian Gulf. The United States and Arab allies hit Islamic State (IS) targets including training camps, headquarters and weapon supplies in northern and eastern Syria in dozens of air and missile strikesREUTERS/Mass Communication Specialist 1st Class Eric Garst/US Navy
US airstrikes ISIS
A Tomahawk cruise missile is launched from the US Navy guided-missile destroyer USS Arleigh Burke, in the Red SeaReuters
US airstrikes ISIS
Residents inspect buildings damaged in what activists say was a US strike, in Kfredrian, Idlib province, SyriaReuters
US airstrikes ISIS
A man stands on rubble after a reported US strike in Kfredrian, Idlib province, SyriaReuters
US airstrikes ISIS
Residents inspect a site hit by what activists say was a US strike, in KfredrianReuters

A Syrian activist group reported that dozens of Islamic State fighters were killed in the strikes but the numbers could not be independently confirmed. Several activists also reported at least 10 civilians killed.

Syrian activists say some of the targets hit were empty, particularly buildings in Raqqa, because militants left them to hide among the civilian population.

US airstrikes ISIS
An F/A-18E Super Hornet, attached to Strike Fighter Squadron (VFA) 31, and an F/A-18F Super Hornet, attached to Strike Fighter Squadron (VFA) 213, prepare to launch from the flight deck of the aircraft carrier USS George HW Bush to conduct strike missions against Isis targets in SyriaReuters
US airstrikes ISIS
An EA-6B Prowler attached to the Garudas of Electronic Attack Squadron (VAQ) 134 lands aboard the aircraft carrier USS George HW Bush after conducting strike missions against Isis in SyriaReuters
US airstrikes ISIS
A F/A-18F Super Hornet attached to the Fighting Black Lions of Strike Fighter Squadron (VFA) 213 lands aboard the aircraft carrier USS George HW Bush after conducting strike missions against Islamic State in SyriaReuters
US airstrikes ISIS
An F/A-18E Super Hornet attached to the Tomcatters of Strike Fighter Squadron (VFA) 31 lands aboard the aircraft carrier USS George HW Bush after conducting strike missionsReuters