A prison governor has apologised to Muslim inmates after they were served non-halal burgers.

A number of Muslim inmates at HMP Ford, an open prison in West Sussex, are claiming they were served pork burgers by prison staff on Saturday evening.

A prison service spokesman told the BBC: "On Saturday a problem in the kitchens resulted in Muslim prisoners being mistakenly served non-halal food."

It is still not clear exactly what meat was used.

The spokesman said: "The governor is apologising to the prisoners affected and an investigation is under way. The prison is working closely with the Muslim chaplain on this matter."