MADRID, Sept 10 (Reuters) - At least four people were killed on Sunday when they were hit by a locomotive near Barcelona while trying to cross railway tracks, emergency services said. The accident happened at 8:22 p.m. in Montmelo near the Catalan capital when seven people crossed the tracks at a forbidden location, Renfe, the state rail operator, said. Three people were killed at the scene and a fourth person died in hospital after suffering a cardio-respiratory arrest, emergency services said on Sunday. Three others were in hospital suffering from injuries. Reporting by Graham Keeley; Editing by Lisa ShumakerOur Standards: The Thomson Reuters Trust Principles.

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Persons: Graham Keeley, Lisa Shumaker Organizations: Renfe, Thomson Locations: MADRID, Barcelona, Montmelo