Normal service has resumed on the Moscow metro's Green Line after damage caused to a tunnel between two stations earlier Wednesday led to transport disruption in the south of the city.
Builders punched a hole in the wall of the tunnel linking the Avtozavodskaya and Kolomenskaya metro stations with a concrete pile they were sinking into the ground at a nearby construction site.
No one was injured as a result of the incident, Interfax reported.
The damage was noticed at 3:28 p.m. and the transit service between the Avtozavodskaya and Kashirskaya stations was suspended.
Normal service got back under way at 7:50 p.m., the metro's press service said.
City Hall said that although repair work is ongoing, the line is safe enough to be used at present.
Investigators will conduct an inquiry into the incident that led to the tunnel being damaged.
Russian Railways, which reportedly owns the construction site where the accident happened, said it would carry out its own investigation.
A spokeswoman for Moscow's building regulator said that the construction being carried out at the site was unauthorized, RIA Novosti reported.