Participants at an annual cancer charity walk in Halifax were told to go home on Friday, after police received a threatening call from a man making references to the Boston Marathon bombings and warning that a similar incident was about to happen there.

Police said the threat was made in call from a downtown pay phone at approximately 7:45 p.m. on Friday evening.

Officers were on-scene within two minutes of the call, but the suspect was no longer there.

Organizers of the Relay for Life at the Halifax Common decided to cancel the event as a precaution. "First and foremost we care about people and our work is about people," Barbara Stead-Coyle, CEO of the Cancer Society told CTV Atlantic.

"We're not prepared to take that kind of risk."

Police said they searched the area for suspicious packages, but they did not find anything.

News of the fundraiser’s cancellation angered many participants, some of whom shared their shocked and angry reactions with CTV News.

"I think it’s disgraceful, really. We're here for people who died of cancer and survivors," one participant said. "We're trying to do good work and this is what happens Its unbelievable. There should be justice for this."

Police said no arrests have been made.

With files from CTV Atlantic