URUMQI, Jan. 24-- Three people were killed and two injured in three explosions in northwest China's Xinjiang Uygur Autonomous Region Friday, local authorities said.

Two explosions took place at a hair salon and a vegetable market in the county seat of Xinhe in the Aksu prefecture at about 6:40 p.m., killing one person and injured two, the region's publicity department said in a statement.

Shortly after the explosions, police arrested three suspects and later a suspect vehicle exploded itself while being besieged by police and two people inside were killed.

The injured have been sent to hospital.

An investigation into the explosions is underway.