Réseau express métropolitain (REM) has filed a lawsuit against roughly ten insurance companies, seeking $156 million to cover losses linked to the discovery of century‑old explosives in Montreal's Mount Royal tunnel. The claim, lodged in 2026, follows the 2020 finding that halted construction on the tunnel and prompted earlier legal actions.
The agency's new filing asks for more than twice the amount previously pursued, targeting the same group of insurers involved in earlier claims.