A man killed by police with a Taser gun has been named locally as Jordan Begley. Begley died in the street near his home where he lived with his mother in the suburb of Gorton.
Police say he suffered a "medical episode" after being shot with the 50,00 volt stun gun by officers.
A man named Connerm who described himself as a relation, paid tribute to Begley on Twitter, posting: "Cousin RIP to my cousin Jordan Begley, sleep tight brother xxxxxx "
Efforts to resuscitate Begley, 23, failed at the scene, eyewitnesses said.
Police were responding to reports of a disturbance in Beard Road, reportedly involving a man with a knife.
Manchester Evening News reported an eyewitness account of police storming the scene. Lee Wilkie said: "Three Transit vans came storming up to the house then they bashed his door down and you could hear all sorts of shouting and banging.
"I think he's been Tasered inside and then the ambulance came outside his house."
Assistant Chief Constable Garry Shewan said: "Officers were dispatched immediately and arrived in eight minutes. On arrival, a Taser was discharged to detain a 23-year-old man.
"At this time it is unclear what happened but at some point afterwards the man suffered a medical episode.
"Paramedics performed first aid on the man at the scene before he was taken to hospital where he died.
"Greater Manchester Police has reported the incident to Her Majesty's Coroner and to the Independent Police Complaints Commission (IPCC) and is working with them to establish the full circumstances that lead to the man's death.
"Specially trained family liaison officers are supporting his family during this very difficult time."
Following Begley's death, Greater Manchester Police reported the incident to the Independent Police Complaints Commission.