Police have launched a murder investigation after a teenager was stabbed to death (Image: UkNewsinPictures)

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A teenager has been arrested on suspicion of murder after a 15-year-old boy was fatally stabbed.

The Metropolitan Police were called to Woolwich New Road in Greenwich, south-east London, at 5.23pm on Monday evening following reports of a stabbing.

Officers found a 15-year-old boy suffering from a stab injury and immediately provided first aid before paramedics arrived.

But despite their best efforts, he was pronounced dead at the scene at 6.08pm.

It was earlier said that brave members of the public had also tried to save him and that a nearby branch of Tesco was evacuated before armed police ran in following reports of the suspect inside.

Police said the boy's next of kin has been informed, although he is yet to be formally identified.

Police are asking for information
(Image: UkNewsinPictures)

Another 15-year-old boy then turned up at a south London hospital with a stab wound not believed to be life-threatening and officers were called.

He has now been arrested on suspicion of murder.

A section 60 order, which grants police additional stop and search powers, has been authorised for Woolwich Common, Woolwich Riverside and Glyndon wards until 10am on Tuesday.

Superintendent Petra Lazar, of South East BCU, said: "It is shocking and extremely saddening that a teenage boy has lost his life as the result of knife crime.

Increased police patrols will be carried out in the area over the next few days
(Image: UkNewsinPictures)

"My thoughts at this time are with the family of the boy who has died.

"This incident will understandably cause worry and concern to local residents and I would like to reassure them my officers are supporting the murder detectives in every way we can.

"Increased patrols will be carried out in the area over the next few days."

Witnesses are asked to call police via 101 quoting reference Cad 5748/05Jul. To remain anonymous, call Crimestoppers on 0800 555 111.