A Tory MP has been injured after attempting to make a citizen's arrest on a vandal at a bus shelter.
Backbencher Stewart Jackson said he challenged a man who was smashing the glass of a shelter with a bottle.
But the culprit kicked him in the chest and ran off.
Mr Jackson, who had been shopping with his wife and daughter in his Peterborough constituency this afternoon, posted about the incident on Twitter.
"Had set to with violent thug kicking in bus shelter in Broadway & suffered kick in side for pains," he wrote.
After some Twitter users thought the MP himself had been imprisoned, he later wrote:
He told the BBC: "I thought any of the shards could have injured a woman or a child so I tried to make a citizen's arrest.
"He squared up to me and threw a few blows which missed but he swung a kick which made contact but I was not badly injured.
"He then ran away and my wife called the police."
Cambridgeshire Police said a 20-year-old man was detained after officers were called to the scene at 3.10pm today.