Commuters who typically pass through the Powell Street BART station experienced major delays this morning, after a man jumped in front of a train and was killed, a BART spokesperson says.

According to BART spokesperson Alicia Trost, witnesses say that a man jumped in front of an east-bound train at 7:55 a.m. He was pronounced dead in the station, Trost says.

As a result, Powell station was closed, Trost says.

As of 9:45 a.m., the transit agency says that major delays persist system wide, but that "trains are now stopping at Powell Street."

"Expect major delays through the morning commute," the transit agency warned. There was also extensive crowding on BART platforms in the East Bay, Trost says.

Stranded BART riders could temporarily ride Muni for free, the SFMTA says.

If someone you know exhibits warning signs of suicide: do not leave the person alone; remove any firearms, alcohol, drugs or sharp objects that could be used in a suicide attempt; and call the U.S. National Suicide Prevention Lifeline at 800-273-TALK (8255) or take the person to an emergency room or seek help from a medical or mental health professional.