A stretch of westbound lanes is closed to traffic on Highway 1 in North Vancouver due to a "fluid spill," DriveBC is warning.

Traffic heading west may need to find a detour as lanes are closed from Mountain Highway to Lynn Valley Road. At around 9 a.m., DriveBC posted to Twitter that all lanes were open.

"Expect heavy delays due to congestion," DriveBC added in its post.

It's unknown what material has spilled or if it's connected to construction in the area.