An emergency evacuation has taken place at the O2 Arena in London, APA reports citing Sputnik.
According to an eyewitness, an announcement was read out saying: "Due to an emergency it is necessary to evacuate the building."
The reason for the emergency is still unclear.
The O2 arena is located in south-east London.
Earlier, London Euston station had been evacuated following reports of a stabbing incident.