... At least one of the masked men is holding a rock in his hand.
The three are confronted by protest organizer Dave Coles, president of the Communications, Energy and Paperworkers Union of Canada. Coles makes it clear the masked men are not welcome among his group of protesters, whom he describes as mainly grandparents. He urges them to leave and find their own protest location.
Coles also demands that they put down their rocks. Other protesters begin to chime in that the three are really police agents. Several try to snatch the bandanas from their faces.
Rather than leave, the three actually start edging closer to the police line, where they appear to engage in discussions. They eventually push their way past an officer, whereupon other police shove them to the ground and handcuff them.
Late Tuesday, photographs taken by another protester surfaced, showing the trio lying prone on the ground. The photos show the soles of their boots adorned by yellow triangles. A police officer kneeling beside the men has an identical yellow triangle on the sole of his boot.