VIENNA (AFP) - Three people were killed and 34 were injured on Saturday when a "mentally unbalanced" man drove a 4x4 into a crowded pedestrian street in the southern Austrian city of Graz, a local official said.

Witnesses said the vehicle hurtled into one of the main pedestrian shopping streets of Graz, Austria's second city. The driver has been detained, governor Hermann Schuetzenhoefer said.

This story is developing.