A cricket match at The Oval was halted this afternoon after a missile which looked like a crossbow bolt was thrown onto the outfield.
The match, a London derby between Surrey and Middlesex, was called to a halt after the missile was reportedly launched from outside the ground.
talkRADIO reporter Alex Dibble is at the scene and says many of those present believe the projectile may have been fired by a child, possibly by mistake.
Alex also told us that the arrow is about a foot long, pink/purple in colour, and looks like it was made from plastic or carbon fibre.
Players and officials were removed as the incident was investigated and spectatators were reportedly told to take cover. BBC Sport reported that armed police were dispatched to the scene.
A spokesperson for the Metropolitan Police confirmed that officers were aware of the incident and an investigation was taking place.
A statement said: "Police were made aware at 16:35hrs on Thursday, 31 August of reports that an arrow or crossbow bolt had been loosed into the Oval Cricket ground.
"The ground is in the process of a controlled evacuation. There are no reported injuries." No arrests have been made yet and it is not clear what the motive was.
Middlesex Cricket tweeted that a "crossbow bolt landed on the square."
Surrey cricketer Stuart Meaker has also tweeted saying "we have just officially gone off the field because a metal tipped arrow just landed on the pitch."