A man has been arrested on suspicion of murder after one person died and seven others were injured in stabbings across Birmingham.
A 27-year-old man was arrested at an address in the Selly Oak area of the city at about 04:00 BST, West Midlands Police said.
Police said he was also being held over seven counts of attempted murder.
The attacks happened at four different locations across the city centre over 90 minutes early on Sunday.
Police said the suspect was being questioned in custody.
Police were first called to the attacks just after 00:30 BST on Sunday at Constitution Hill, where a man sustained a superficial injury.
Some 20 minutes later they were called to Livery Street, near to Snow Hill railway station, where a 19-year-old man was critically injured and a woman was also hurt.
At 01:50 BST, police were sent to Irving Street, where a 23-year-old man suffered fatal injuries and another was seriously injured.
At 02:00 BST they were called to Hurst Street, in the city’s Gay Village, where a 32-year-old woman was critically injured and two men suffered lesser injuries.
The force said it believed the attack was “random”.
Ch Supt Steve Graham said: “Officers worked through yesterday and into the early hours of this morning in a bid to trace the man we believe responsible for these terrible crimes.
“We issued CCTV footage of the suspect and had a strong response from the public. I’d like to thank everyone who shared our appeal and who provided information to the investigation.
“Clearly this is a crucial development but our investigation continues.”
A hotline number and website have been set up for members of the public to provide information.
The streets involved remained closed on Monday morning while investigations continued.