A man was taken to hospital after he was both stabbed and sprayed with an "unknown substance" in Erith.
Armed police were dispatched to Lincoln Road near Whitehall Lane shortly before 1pm yesterday (January 29) following reports of a brawl between a number of men in the street.
Officers on the scene discovered the injured man who had a stab injury to his arm.
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He was reported to have been attacked by a group of other men who also sprayed him with this unknown substance.
The injured man was taken to hospital where his injuries were not deemed to be life-threatening.
A Met spokesman said: "Three males were arrested on suspicion of GBH and taken into custody at south London police stations."
Police are continuing with their enquiries.
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A spokeswoman for the London Ambulance Service has said: "We were called at 12:38pm yesterday (January 29) to reports of an incident on Lincoln Road, Erith.
"We sent an ambulance crew and an incident response officer to the scene.
"We treated a person at the scene and took them to hospital as a priority."
This was the third reported stabbing to occur in south-east London yesterday with incidents occurring in Grove Park and Woolwich last night.
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