Police cordoned off a tower block in the Gilmerton area of Edinburgh during their investigation A man has been killed and another seriously injured following a fight in an Edinburgh flat.
Police were called to a disturbance at Craigour Place on the south side of the city at about 2045 GMT.
Officers sealed off the Castleview tower block while a team of negotiators liaised with the residents inside.
When they gained access to the flat they found the body of a man, believed to be in his 40s. Another man had been stabbed and is now in hospital.
He is being treated for non life-threatening injuries.
It is understood the men knew each other and an argument between them had escalated out of control.
Detectives said they were following a positive line of inquiry and have appealed for witnesses.
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