Police are believed to be still hunting a man following an incident in which armed officers were called to Huddersfield train station.

A man went onto the tracks and into one of the tunnels on Tuesday night, leading to police closing the tunnel which caused widespread disruption to train services.

It happened after West Yorkshire Police officers had gone to the station as part of drug dealing investigations at about 8pm.

Armed police were drafted in and at 9.35pm officers tweeted: “For the safety of train users and the man involved the tunnel was closed resulting in on going disruption to train services.”

READ MORE: Armed police called to Huddersfield railway station

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.

Tamanna Rahman tweeted this picture, saying: "Police have moved passengers off platform nearest tunnel in ongoing standoff with suspected gunman."

By 10.20pm the tunnel had been reopened.

Police have released a statement saying: “The search has now concluded and train service resumed with the tunnel having reopened.

West Yorkshire Police would like to thank people caught up in the disruption for their patience during this incident.”

It is understood the man was not arrested and is still being sought by police.