A social media post referencing a gang named BDK, which stands for 'Blood Drill Killers', made up of teenagers of African background, some as young as 14 years old.

Victoria police say they have made significant arrests in recent weeks over a newly formed gang that has been linked to a string of robberies and violent street brawls in Melbourne's west and bayside suburbs.

The Wayward Taskforce, formed earlier this year to target young criminals in the west, say they are actively monitoring the emerging group, dubbed the "Blood Drill Killers", which members refer to as BDK on social media and has ties with the more established Menace to Society gang.

A police spokeswoman said the group, comprised of mostly young teenage boys of African background, had been linked to a number of violent crimes in Melbourne's west in recent weeks.

"Victoria Police is aware of an emerging group called Blood Drill Killers. It is believed some of their offending has also been committed with Menace to Society members," police said in a statement.