Man held after Hull city centre bank blaze:
An eyewitness described seeing a man wielding a "cleaver" inside Santander in King Edward Street, Hull, at about 13:00 BST before he started a blaze.
Police said they were called to reports of a man with a bladed weapon who was carrying petrol.
Three people have been injured.
These things are almost a daily occurrence now.
Nowhere is safe.