Emergency services were detained for several hours after a man took to the roof of a four-storey building in Northumberland.
Police, fire crews and ambulances were at the scene at Alnwick on Saturday evening for almost four hours, with witness reports that the man was throwing tiles at those below.
A man has been arrested on suspicion of causing criminal damage.
Emergency services were informed of a man on the roof of the former Maltings and Alnwick Brewery, since redeveloped as The Malthouse, on Lagny Street, at 5.43pm.
Northumbria Police, Northumberland Fire and Rescue Service and the North East Ambulance Service all attended.
Police officers spoke to the man.
Claire Barber, who runs a PR company and lives in Alnwick, watched events unfold over the course of two to three hours after driving into town to pick up her daughter.
She said: “There was a lot of police whizzing into the middle of Alnwick.
“There was a man sitting on the apex of the roof throwing tiles at the police. It was unbelievable.
“He kept moving along on top of the roof and then actually going half way down the roof, which was really dangerous, it was very high up and very steep as well.
“It got dark very quickly.
“He kept almost looking like he was going to fall off. There was police all around, they were shining torches. The police were keeping a really tight cordon, they closed the road off.
“There were a lot of people out watching what was going on. It went on for quite a few hours.”
The man eventually came down at 9.35pm.
A 40-year-old man has been arrested on suspicion of causing criminal damage and remained in custody yesterday morning.
A police spokesman said: “Police were called to the Malthouse on Lagny Street following reports of a man on the roof at 5.43pm.
“Officers attended and talked to the man. He came down off the roof at 9.35pm.
“We have a 40-year-old man who has been arrested on suspicion of causing criminal damage.”