It was a tense morning at the Canada Post distribution centre in Port Coquitlam on Tuesday.
Port Coquitlam Fire Chief Nick Delmonico said crews were called to 1628 Industrial Ave. where a package was accidentally opened that got white powder on a few employees.
Not knowing what it was, officials cleared the building, isolated the package and called the RCMP.
The RCMP were able to trace the package back to a sender in China.
Delmonico said it contained some sort of non-gluten protein powder.
Delmonico said normally it can take days to determine what a substance is, but that quick work by the RCMP solved the mystery in a matter of an hour or two.