A video has surfaced online showing an attack on a London synagogue by a drunken mob.

The footage is from the Ahavas Torah Synagogue in Stamford Hill, a north London neighborhood that is home to Europe's largest Orthodox Jewish community.

Warning, strong language:

It shows a group of Jewish men barricaded inside the synagogue and attempting to fight off the mob of around "20 men" with chairs and other makeshift weapons.

The two groups can be seen hurling sticks and other missiles at each other through the synagogue's entrance, as several men unsuccessfully attempt to storm the building. Two of the door's windows are already shattered at the start of the video.

At one point, a number women from outside the synagogue attempt to break up the fight, to little effect. 

Police say they have arrested six people in connection with the attack, and that one person was injured during the altercation, which occurred some time after 1 a.m. on Saturday night.

Mark Gardner, a spokesperson for the Community Security Trust (CST) which monitors anti-Semitism, told Arutz Sheva that police were still looking into the incident, but that initial investigations suggest it was a street fight which escalated and that the synagogue itself was not the initial target.

"There was a party in a house... and there was then some kind of fight between people from the party and members of the local Jewish community, which then ended up spilling over into a nearby shul," he said.

The precise motive for the attack is still under investigation, but Gardner said it was unrelated to a neo-Nazi rally planned for Sunday, which was to have taken place several miles away. The rally was cancelled after the organizer was convicted of hate crimes in an unrelated case.

One community member said the incident began after party-goers shouted anti-Semitic abuse at a Jewish man, provoking a confrontation which quickly became violent.