A man has been arrested for impaired driving after four pedestrians were struck by a car downtown on Saturday afternoon.

Authorities were called to the King Street West and Bay Street area around 3 p.m.

Police said the 27-year-old driver was travelling east on King Street when he mounted the sidewalk and hit a group of people.

Update: Collision: King St W/ Bay St

- 4 pedestrians struck, 3 transported to hosp.

- 1 life threatening, 2 non-life threatening

- driver, non-life threatening and arrested for possibly impaired#GO14644189@TPS52Div

^ka — Toronto Police Operations (@TPSOperations) August 3, 2019

Police said three of the pedestrains were transported to hospital. One of the pedestrians is in a life threatning condition, while two others have non-life threatening injuries.

The 27-year-old driver, who was allegedly impaired, did not suffer serious injuries.

King Street West is blocked from University to Bay Street, police say.