S.F. protest planned Friday on BART’s Montgomery Station platform

Protesters form a human chain to block entrance to a BART train on Nov. 28. Protesters form a human chain to block entrance to a BART train on Nov. 28. Photo: Jill Tucker / Jill Tucker Photo: Jill Tucker / Jill Tucker Image 1 of / 9 Caption Close S.F. protest planned Friday on BART’s Montgomery Station platform 1 / 9 Back to Gallery

Protesters plan to gather Friday morning on the underground platform of BART’s Montgomery Station in downtown San Francisco, which could affect service on the transit system.

The demonstration is part of a bid to get Alameda County prosecutors to drop charges against 14 activists who were arrested in late November after some chained themselves to trains and halted service at West Oakland Station.

The earlier protest was one of many in response to a Missouri grand jury’s decision not to indict a white police officer who shot and killed an unarmed black teenager in Ferguson, Mo.

Friday’s protest, which was announced on Facebook, is set to begin at 7 a.m. Organizers are encouraging people to bring metal spoons.

Organizers of the event, titled “BART Friday: No Business As Usual,” issued three demands — that charges be dropped, that the BART police force dissolve itself, and that the transit agency provide cheaper fares for low-income riders.

“As long as it remains business as usual to gun down black women, men and children in the streets of this country,” the Facebook page reads, “there will be no business as usual anywhere or for anyone.”

The “Black Friday 14” were arrested Nov. 28 and charged with misdemeanor trespassing on railroad property. BART service between Oakland and San Francisco was disrupted for two hours.

Jim Allison, an agency spokesman, said the agency supports the right to peacefully protest and that a permit process is in place for demonstrators who want to gather outside BART’s fare gates.

“However,” he said, “if protesters choose potentially dangerous actions that cause major service disruptions, BART police are prepared to enforce the law and ensure public safety.”

Hamed Aleaziz is a San Francisco Chronicle staff writer. E-mail: haleaziz@sfchronicle.com Twitter: @haleaziz