Police responded to an incident in central London on Saturday night following a report a van has hit a number of pedestrians on London Bridge. The Met Police has confirmed they responded to reports of stabbings in nearby Borough Market, and there were reports of gunfire. The Prime Minister confirmed the incident is being treated as an act of terrorism. At 2208hrs British Summer Time (BST), Metropolitan Police officers responded to reports of a vehicle in collision with pedestrians.Witnesses have said a white van mounted the pavement and ran over pedestrians. There are reports there are armed police at the scene, and about five people are being treated for their injuries after being hit by the vehicle. BBC reporter Holly Jones, who was on the bridge at the time of the incident, said the van was driven by a man and was “probably travelling at about 50 miles an hour”. Ms. Jones said the van, which was travelling from the direction of central London, headed towards the south side of the river. She later reported seeing a man being arrested by police. She said he was handcuffed and had his shirt off. An eyewitness told Sky News he saw people who seemed to have been run over and people being placed in an ambulance covered in blankets. A nearby railway station has been closed and police are advising people to stay away from the area.