A gunman killed six people in a shooting spree in Krakow's Old Town on Saturday, before being shot and detained by police. The gunman, who is also suspected of killing three family members before the attack, later died in hospital .

On Monday, Poland's national prosecutor's office announced a formal investigation .

Nevertheless, much is still unknown about the details of the crime, leaving social media users to fill the information vacuum with fake images of the attacker and alleged screenshots of his online profile. DW Fact Check breaks down the developing story.

Are these genuine images of the attacker?

Claim: A viral picture has been circulating on social media claiming to be the real image of the suspected attacker.

DW Fact Check: Fake

In the post, the image is posted with the caption, "[…] The perpetrator of the attack in Krakow is a 25-year-old Polish citizen, Polish police have reported. The death toll has reached six.…