LONDON (AP) – British police said Friday they have responded to reports of “shots fired” in and around London’s Oxford Circus subway station, but have not located any casualties.

The busy station has been closed and police have told people in the area to take shelter in stores.

The Metropolitan Police said officers were called just after 4:30 p.m. to “a number of reports of shots fired on Oxford Street and underground at Oxford Circus tube station.”

Police say officers have not found any casualties.

The force says it is responding “as if the incident is terrorist related” — but has not said whether they believe it is.

Witnesses on social media reported people running into nearby shops and pubs for shelter.

Transit authorities say the station has been evacuated and trains are not stopping there.

Transport police advised people to avoid the area, which was packed with commuters and shoppers at the end of the working week and amid Black Friday sales.