A man armed with grenades, a rifle and a pistol attacked holiday shoppers Tuesday in the eastern Belgian town of Liege, leaving four people dead and?75 others injured.

It was not clear what motivated the killing spree in the busy Place Saint-Lambert square, the central entry point to downtown shopping streets in Liege, CBS news reported.

The attack prompted hundreds of shoppers to stampede down old city streets, fleeing explosions and bullets, the report said.

The gunman, identified as Nordine Amrani with criminal records, was a local people in Liege and dead in the killing spree.

The 33-year-old man has been summoned to a police station on Tuesday morning for unknown reason before the killing took place at lunch time.

The other dead were two teenage boys, 15 and 17, and a 75-year-old woman, said Liege Prosecutor Daniele Reynders.

There is still no confirmation on whether the gunman took his own life or was killed by the police force.

The injured included a two-year-old girl who was in serious condition, according to a report of the La Libre newspaper. Fifty-two of the injured have to receive medical care at local hospitals.