A woman has died, BART officials confirmed Sunday morning, after attempting to jump between the concourse and platform levels of Civic Center Station late Saturday night.

According to BART spokesperson Taylor Huckabee, the woman drew attention by "acting irrationally" on the concourse level (that's the "upstairs" level of the BART station, where you buy tickets, etc) at 11:36 p.m. Saturday night.

She then leapt from that concourse level to the platform, Huckabee says, describing her as "unstable." She did not survive the jump, and was "declared deceased at 12:13 a.m.. She has not been identified as of publication time.

The station was closed for the rest of the evening, as BART police "assess the situation and the coroner arrives." According to Huckabee, the station will be ready to reopen at 8 a.m., the usual opening hour for Sunday service.

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.