A video camera captured what looks to be white gravel hitting Trudeau and one of his bodyguards as he walked toward his campaign bus in London, Ontario. The Liberals canceled an event late last month because of safety concerns linked to anti-vax protesters.
Trudeau played down the incident on his plane later, saying he may have been hit on the shoulder, and once he had pumpkin seeds thrown at him, according to a video posted on Twitter by Global News TV reporter Abigail Bimman.
Earlier on Monday, Trudeau assailed Conservative leader Erin O'Toole's opposition to vaccine mandates, including for his own candidates, and called the hecklers "angry mobs" of anti-vaxxers.
Around 74% of eligible Canadians are fully vaccinated, but a fourth wave of the coronavirus pandemic is currently building, mostly among the unvaccinated.