Mounties are investigating after a Coquitlam, B.C. man was injured by a homemade explosive that rocked a quiet residential street Tuesday night.

Residents reported hearing a loud blast coming from a home near Ross Avenue and Gatensbury Street at around 7:20 p.m. Officers arrived to find a man who lives at the property suffering serious, but non-life-threating injuries.

It's still unclear what the explosive was made of, what it's purpose was or whether it was set off accidentally.

"In terms of where those materials came from, why they were there, why it went off—we still need to answer all those questions," said Cpl. Michael McLaughlin.

The RCMP said its bomb squad later managed to find and disable a "second item of concern" at the home, and that members would be continuing to work in the neighbourhood Wednesday to ensure it's safe.

"The secondary detonations that some people heard—that was us making sure the area was safe," McLaughlin said.

Police have not released the injured man's name, but are calling him a victim in the incident.

Neighbours, however, identified him as a Coquitlam firefighter who lives in the home.

Property records show the registered owner of the home as Craig Banks. A firefighter with the same name received an 'exemplary service medal' from the Governor General last year.

Forensic teams are at the scene working to reconstruct the blast.

Anyone who saw or heard anything unusual in the area Tuesday evening is asked to call police.

With files from CTV Vancouver's David Molko