Four people died in a knife attack along with the use of smoke bombs on Friday in the city of Taipei, China's Taiwan region.

The attacker was among the dead, according to media reports. Five others were injured in the attack that happened around 5:30 p.m. in Taipei Main Station of the city's metro. 

CCTV footage shows the suspect, wearing a gas mask, throwing smoke bombs in the metro station. The smoke bombs caused a bystander to suffer from smoke inhalation.

The suspect attacked a person, who was later confirmed dead from severe injuries, media reports cited the hospital as saying.

The suspect then fled the scene to another busy business area and attacked several more bystanders, leaving six injured, one of whom was confirmed dead from serious injuries.

The suspect has been identified as a 27-year-old male and is believed to have fallen to his death from a department store while being surrounded by the police. His motive is still under investigation, local media reported.

(With input from Xinhua)