Crazed knifeman goes on rampage in hospital injuring four as terrified medics and patients flee for their lives

FOUR people have been injured by a knife-wielding attacker at a Shanghai hospital. Cops raced to Ruijin Hospital on Saturday morning. Twitter

FOUR people have been injured by a knife-wielding attacker at a Shanghai hospital.

Cops raced to Ruijin Hospital on Saturday morning.

Four people have been injured after a knifeman went on a rampage at a Shanghai hospital[/caption]

Horror unfolded at Ruijin Hospital this morning[/caption]

Videos on social media showed chaos as visitors clambered under turnstiles to get out of the hospital.

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