Richard McClean, managing director of DB Regio Tyne and Wear, which operates the Metro on behalf of Nexus, said the incident showed how dangerous it was to obstruct the doors of trains.
On 7 June a walk-out by of drivers and other workers in a pay dispute with operating company DB Regio Tyne and Wear (DBTW) brought the network to a standstill, with further action planned on 21 June.