B, D, F, M lines at 34th Street and Broadway....

B, D, F, M lines at 34th Street and Broadway. (Charles Eckert) Credit: B, D, F, M lines at 34th Street and Broadway. (Charles Eckert)

A fire in a Brooklyn subway tunnel that knocked out service during Tuesday night's rush hour caused minimal damage and won't cause any further commuting problems, officials said Wednesday.

Communication cables running along the tunnel just north of the DeKalb Avenue station were burned during the blaze, which began at 4 p.m. and was put out at around 6:15 p.m. Tuesday, according to MTA and FDNY officials. N/Q/R and B/D/F service, which was canceled and rerouted during the evening commute, resumed by 8 p.m., though straphangers encountered delays afterward.

MTA spokesman Kevin Ortiz said the fire spared the agency's switches and signals. He said the damage is still being assessed, but that any necessary repairs could be done without shutting down service.

Poll: Hochul leading Republican rivals ... Long Ireland brewery to close ... Visiting Christmasland in Deer Park Credit: Newsday

Accused cop killer in court ... Teacher's alleged victims to testify ... Popular brewery to close ... Visiting Christmasland in Deer Park

Poll: Hochul leading Republican rivals ... Long Ireland brewery to close ... Visiting Christmasland in Deer Park Credit: Newsday

Accused cop killer in court ... Teacher's alleged victims to testify ... Popular brewery to close ... Visiting Christmasland in Deer Park

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