Submitting.
Patients and staff were evacuated from the building, but nobody was injured in the fire.
A 43 year old man was arrested on suspicion of arson with intent to endanger life.
He remains in police custody today.
Detective Inspector James Entwistle of Leeds CID said: This was a very serious incident which caused significant damage to the hospital. Luckily no one was injured and everyone in the hospital was safely accounted for. I would like to appeal to anyone who was impacted by the fire in either the A&E or X-Ray department between 5 and 6pm to come forward with any information to assist our enquiries.