A man has been arrested on suspicion of causing an explosion in a public place following an incident in Norwich involving a paintball grenade.

Police were called to Pettus Road shortly after 4pm on Wednesday following reports a device had been thrown from a property. The device, which exploded, is thought to be a paintball grenade.

Armed officers attended and a man in his 40s was arrested on suspicion of causing an explosion in a public place – likely to cause injury or damage. He has been taken to Wymondham Police Investigation Centre where he will be questioned.

Local commander, Inspector Graham Dalton, said: 'This incident and our subsequent response did attract public attention and cause concern among the local community. I would like to reassure the public we take offences of this nature very seriously. No one was injured and we believe this to be an isolated incident.'

• Police have confirmed the man has been released under investigation pending further enquiries.