Armed police swooped on a Huddersfield filling station last night.
Eye-witnesses told how officers with guns surrounded a car at the BP filling station in New Hey Road, Salendine Nook, shortly after 8.30pm.
The armed officers were joined by others and some of the police apparently had their faces covered.
They are believed to have arrested a man and a woman from the car, which is thought to have been a taxi.
One local driver, John McNamara, saw what happened.
He said: “Two riot vans, a standard police car and an undercover police car pulled up at the BP petrol station in Salendine Nook.
“The undercover police car had blocked a taxi in the forecourt. There were two police officers in plain clothes, covering their faces with bandanas, they both had guns strapped to their legs too.
“They were apprehending a bald man, middle aged, who appeared to be the taxi driver. He was led off into the back of a police van, shortly followed by a woman who was in the back.
“The riot vans left, an ambulance arrived and they appeared to be treating someone in the passenger side of the taxi. One also went into the petrol station itself.
“We watched for about fifteen to twenty minutes, and as we were leaving another police car arrived with sirens on.”
Images from the scene show a number of police vehicles at the filling station.
Police are yet to comment on the incident.