KRAKOW, Nov 9: Six people were killed and 15 others, including two police officers, were injured after a gunman opened fire from a vehicle at the Main Market Square in Krakow, Poland, on November 7.

The attack took place at around 3 pm local time. The gunman, dressed in military-style clothing and a bulletproof jacket, drove into the crowded square and fired at pedestrians and others present with a military-style long gun, police said.

Four women and two men were killed in the shooting. The gunman was injured in an exchange of fire with police and was taken into custody before being admitted to hospital.

He died while undergoing treatment early on November 9, police confirmed on Monday.

Police also recovered the bodies of the gunman's mother, father and sister at the family's residence. Investigators suspected that they had suffered gunshot wounds and were examining whether the three deaths were linked to the Krakow shooting.

Polish Prime Minister Donald Tusk took stock of the situation after the attack. Police and investigating agencies were probing the case for murder, attempted murder and possible terrorist activity.