A roundabout in Oxford was sealed off by police in the early hours of this morning with multiple officers on the scene.
The incident occurred at the roundabout that joins Grenoble Road and Watlington Road in Blackbird Leys.
One eyewitness reported seeing around 10 police cars and 15 to 20 police officers at the scene.
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He added: "The Grenoble Road roundabout was closed. There was no through road going towards Stadhampton or towards the Kassam Stadium, or to Cowley.
"Police taped off all the exits from the roundabout. There were about 10 police cars as well as 15 to 20 police officers.
"I am not sure what happened but it must have been something big judging by the police presence."
Thames Valley Police has been contacted for comment.
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