Woman, 73, beaten unconscious in attack on BART train

A 73-year-old woman was assaulted on a BART train in the East Bay Wednesday, an official for the transit agency said. A 73-year-old woman was assaulted on a BART train in the East Bay Wednesday, an official for the transit agency said. Photo: Sam Wolson / Sam Wolson / Special To The Chronicle Photo: Sam Wolson / Sam Wolson / Special To The Chronicle Image 1 of / 14 Caption Close Woman, 73, beaten unconscious in attack on BART train 1 / 14 Back to Gallery

A man randomly and repeatedly kicked a 73-year-old woman in the back of her head until she lost consciousness on a BART train bound for Richmond Wednesday morning, according to the transit agency.

Wilbert Winchester, 23, was arrested at gunpoint when the train stopped at Coliseum Station on suspicion of assault with great bodily injury, said Taylor Huckaby, a BART spokesman.

The woman was reading a magazine around 4:30 a.m. between the San Leandro and Coliseum stations when Winchester, whom she didn’t know, attacked her, Huckaby said.

She briefly lost consciousness and bled from her head in the unprovoked assault, according to a BART log of the incident.

The woman was transported to a hospital to be treated for non-life threatening injuries.

Michael Bodley is a San Francisco Chronicle staff writer. Email: mbodley@sfchronicle.com. Twitter: @michael_bodley