Offices of social network Facebook in Hamburg were vandalised by a group of 15-20 individuals, local media reported on Monday.

The European head of the social media giant is under probe in Germany over the organization ‘s alleged failure to eliminate racist hate addresses.

A Facebook representative said, “We can declare the claims lack merit and there’s been no breach of German law by Facebook or its workers.”

The organization added that it would support “counter language” and step up the tracking of xenophobic comments.

The authorities have started an investigation into the event.