The UK embassy in Baghdad is said to be aware of the tragedy.
IS captured Ramadi, which is 68 miles west of Baghdad, in May 2015 in what was a major blow to Iraqi forces.
A long campaign by the Iraqi government to retake Ramadi was hampered by snipers, booby traps and the destruction by IS forces of all bridges leading into the city.
Troops launched a major offensive to rid the city of bombs and debris left by militants after driving them out.