A woman was killed and five other people were injured Monday when a taxi driven by a 73-year-old man hit a group of pedestrians on a crosswalk in Tokyo, police said.

The vehicle hit the six people on a busy road in the capital's Shibuya Ward at around 7 p.m., when the driver, Heiji Aizawa, failed to stop at a traffic light, the police said.

The taxi's passenger told police Aizawa appeared to have suffered a health issue.

Yuko Sato, 49, died in the incident. Of the other five people, a woman in her 40s and her 9-year-old son sustained serious injuries. Aizawa was also taken to hospital.

The taxi stopped some 100 meters away from the site after running into a road center divider, the police said, adding they will question the driver over the incident after he recovers.