Armed police have been called to Dartford railway station after reports of a man armed with a sword.

Pictures on social media show officers with weapons at the station, and suggest a man had got on a train at Greenhithe with a samurai sword.

British Transport Police said officers were called shortly before 12.45pm to Dartford station after reports of a man in possession of "a large knife."

Officers from BTP and Kent Police were quickly on scene and detained a man on the platforms at the station.

A 23-year-old man was arrested on possession of an offensive weapon, and is being taken to custody.

There are no reported injuries.

During the arrest a taser device was drawn but not deployed.

This incident is not currently believed to be terror related.

Eyewitness David Johnson tweeted: "#Dartford excellent response to person with large knife/sword on #London bound train by ⁦@BTP⁩ and ⁦@SouthernRailUK⁩. On platform as driver radioed in #armedpolice on site in a minute, passengers off and managed. Well done."

Anyone who witnessed what happened is asked to contact BTP by sending a text to 61016 or by calling 0800 40 50 40, quoting reference 231 of 18/01/2019.