Police have warned against vigilante-style reprisals after a far-right group linked an attack on a man at a train station in Amsterdam to a refugee accommodation centre.

Defend Netherlands, an organisation that was prominent during violent anti-migration protests in The Hague during the election campaign, shared images of the attack at Bijlmer ArenA station on social media with the assailants clearly visible.

They also posted a map with the location of a nearby asylum seekers’ centre,  commenting that a man accused of murdering a teenage girl on a cycle path in August lived there.

The victim was knocked unconscious in the attack, which happened at around 6.45pm on Friday.

The video shows one man knocking him to the ground and kicking him in the head as he lay helpless, before a second man hits him with a bottle.

Police are still trying to trace the assailants, who are described as 1.65m and 1.75m tall (5ft 5in and 5ft 9in), aged around 25 with light brown skin. They both wore dark clothing.

The victim has been discharged from hospital but is still suffering from the effects of his head injuries, police said.

They warned people not to take the law into their own hands, after a man was targeted by suspected vigilantes in a Noord-Brabant village last month.

Defend Netherlands shared the man’s picture on Instagram and said he was responsible for an attack on a woman by youths on fatbikes. After the man was attacked the group posted more messages describing his assailants as “true fighters”.

A spokesman said: “We understand that these images can be hard to watch and stir up emotions, but we urge people not to go looking for suspects themselves and not to share information via social media.”

Anyone with information about the attack or relevant video images should contact police on 0900 8844 or anonymously on 0800 7000.