This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Protesters angry over the Ferguson, Mo., grand jury decision have forced the closure of a Bay Area Rapid Transit station in West Oakland, triggering massive delays across the region’s busy rail system, officials said Friday.

About 15 to 25 protesters – who appear to be part of a nationwide movement using the social media hashtag #BlackLivesMatter – chained themselves to a train at the station, said BART spokeswoman Alicia Trost.

The West Oakland station has been closed, shutting off access to San Francisco, Trost said.