Nine people have been injured, four of them seriously, after a person released smoke bombs at a Taipei subway station and then attacked bystanders, the official Central News Agency said.
Taiwan Premier Cho Jung-tai confirmed the attack in comments on his Facebook page, without providing further details.
The attacker was suspected to have then killed himself, the Central News Agency said.
It was not immediately clear what the motive was.

Trump says there will either be a deal with Iran or US will 'finish the job'
Storms kill at least eight in central China as Typhoon Bavi looms offshore
Landslide in China's Gansu province traps 16
Hamas dissolves Gaza government, Israel dismisses move as 'stunt'
Death toll from Venezuela quakes rises to 3,535 as thousands remain displaced
Russian strikes kill 26, exposing Ukraine air-defence shortages
Clashes escalate at Sri Lanka prison to leave 25 dead, many more injured
Six killed in India's Mumbai as rains wreak havoc, disrupt travel
