Police say six are dead after a shooting rampage at a mall in Munich Friday evening. The shooters behind the attack are still being sought, and we still have little solid information about the incident.

But a video posted on Twitter offers some potential indications of the attackers’ motivation. In the video, which has been widely shared online, a Munich man says the shooters are likely German skinheads or white supremacists.

Übrigens trendet "Scheiß Ausländer" gerade, weil ein Augenzeuge bei RTL vorhin sagte, der Täter habe das gerufen: pic.twitter.com/11UfS1WwaG — Christian Mutter (@christianmutter) July 22, 2016

In the video, the man says that a friend of his who works at a shop inside the mall where the shooting took place communicated with him while hiding under a shop counter from the shooter. According to this man, the shooter was wearing the boots favored by skinheads (called “jump boots“), together with a black backpack. According to the man speaking in the video, the shooter shouted “fuck foreigners” (“Scheiße Auslander”) as he roamed around the shopping mall.

The German phrase, “Scheiße Auslander,” became a trending hashtag in Munich Friday night. But it seems that most of the people using the hashtag are under the impression that it means the shooter is a foreigner (in other words, a jihadist) and that Germans are using it to protest the Merkel government’s policy of allowing Syrian refugees into the country.

According to the testimony in the video (which again, remains unconfirmed), the shooter is actually a German man, expressing xenophobic sentiments.

The Olympia-Einkaufszentrum mall in Munich was sealed off around 6 pm on Friday afternoon, after police responded to reports of shots fired. A massive police operation remains underway, and authorities asked that people avoid public places and transportation systems, due to fears that the gunman or gunmen may still be at large.