The incident happened on March 2 at the metro station “Army” in Kharkov. People were locked in the car. About a minute the driver door did not open. About it in social networks reported the passengers on the train.
The press service of the Kharkiv metro noted that this measure was forced. In the rear cabin of the composition of the alarm. The driver, following the instructions did not open the door until I checked everything was in order. After checking the driver opened the door, and the passengers were able to leave the cars.