RCMP have now tested a Coast Mountain bus and say there was no hazardous material on board.
The incident shut down the Coquitlam Centre bus loop for much of the afternoon.
The whole thing started when a driver and two passengers apparently said they didn’t feel well, and there may have been some kind of white substance at the back of the bus.
The driver may have suffered a mild seizure, and is now okay.
No update on the passengers, as police don’t know where they are.