Canadian Prime Minister Justin Trudeau was struck by gravel Monday during an angry protest in London, Ontario.

Trudeau had left a brewery to return to his campaign bus before being hit by gravel. Two others were also hit by gravel, according to reports.

There were no injuries.

Trudeau has been attending campaign stops after calling for a snap election in mid-August. His goal is to win a majority for his Liberal Party.

Protesters have gathered at political events to oppose COVID-19 vaccine mandates and other restrictions in Canada.

Trudeau had to cancel an event to address supporters in Bolton, Ontario, in late August due to security concerns.

Similar events have resulted in other government and health officials being harassed, along with some restaurant owners and health workers.

"Nobody should be doing their jobs under the threats of violence or acts that put them in danger," Trudeau said during a Montreal campaign stop. "But it's not just political rallies where this is happening."

Trudeau has pushed for vaccine mandates, a key issue in the Sept. 20 election. Conservative Leader Erin O’Toole wants 90% of eligible Canadians to be fully vaccinated and would use paid time off for employees as well as providing transportation.

Coronavirus