A man has been arrested on suspicion of murder after two men were fatally stabbed at a business in central London.
Emergency crews were called to Long Lane, Southwark, at about 1pm on Monday following reports of multiple stabbings inside a commercial property.
The Metropolitan Police said four people were treated for stab wounds.
A 58-year-old man was pronounced dead at the scene. Three other men were taken to hospital, where a 27-year-old later died.
The force said a 31-year-old man from Hackney, who was initially detained in connection with the incident, was arrested on Monday.
The Met Police said he remains in hospital and his condition is not life-threatening.
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The incident took place inside a business premises, however, a crime scene is in place at a nearby hotel where the arrested man entered.
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Speculation that the man was staying at the hotel is not accurate, the force added.
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Detective Chief Superintendent Emma Bond said: “Our thoughts are first and foremost with the family and friends of the victims of this tragic incident.
“Our investigation continues at pace and we are working hard to understand the full circumstances.
“I understand there may be concern in the local community and there will be an increased police presence in the area over the coming days.
“I would also encourage anyone who may be worried to speak to an officer.”