Two police motorcycles in the motorcade of the British and Belgian prime ministers along a motorway in Belgium were knocked over by a car in an apparent accident.

According to Belgian media reports, the two motorcyclists, who were escorting Theresa May and Charles Michel after they laid wreaths at World War One British graves, were taken to hospital and no one else was injured, according to La Libre Belgique newspaper.

De Standaard quoted Belgian premier Michel?s spokesman describing the incident as an ?unfortunate accident?.

Theresa May was in Belgium to mark Sunday?s centenary of the end of the 1914-18 war and later traveled for further ceremonies in France.