MOSCOW (AP) – A section of tunnel collapsed in the Moscow subway Sunday, triggering a fire on a train, officials said. No injuries were reported.

Emergency Situations Ministry spokesman Viktor Beltsov said a concrete section fell on a train between the Sokol and Voikovskaya stations in north-central Moscow, and that train caught fire. Rescuers safely evacuated all passengers, he said.

Train service was halted.

Moscow subway chief Dmitry Gayev said the accident apparently was caused by workers who were erecting a street billboard in the area and damaged piles supporting the tunnel’s roof, the ITAR-Tass news agency reported.

A fleet of ambulances and fire engines responded to the subway stations, creating huge traffic jams. Authorities launched additional buses for travelers.

Gayev said subway service will be restored Monday morning.

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