The hunt is still on going for a man who went onto the tracks and fled into a tunnel after police had gone to Huddersfield train station.
Armed officers were called in and police, who had gone to the station as part of drug dealing investigations, closed the tunnel which caused widespread disruption to train services.
The incident happened at about 8pm on Tuesday.
When the tunnel had been closed, and the area was deemed safe, officers began a search of the tunnel and surrounding area, but the man was not found.
The tunnel was closed for about two hours, and during the search for the man officers tweeted: “For the safety of train users and the man involved the tunnel was closed resulting in ongoing disruption to train services.”
People tweeted pictures from the station and described the situation as a “stand-off”.
Trains were cancelled and there were reports the station had been evacuated while police dealt with the situation.
Supt Pat Casserly from West Yorkshire Police said: “We are progressing a number of lines of investigation.
“It cannot be stressed how dangerous it is for any people to go onto railway tracks and for this reason we closed that tunnel to rail traffic to ensure the safety of the suspect and officers.
“Appropriate officers, including armed officers, were deployed to the station due to the nature of the wider investigation.”
Police are still searching for the man following the incident.