A man is being questioned on suspicion of stabbing two men to death in Birmingham city centre last night.
The men, who are believed to be in their 40s, were attacked just before 6pm.
One victim is thought to have been stabbed outside a Sainsbury's store in Martineau Place, while the other was found slumped near a Boots store in Union Street with fatal injuries.
Officers administered first aid on both men, but both were pronounced dead at the scene.
A man was arrested in New Street near the Odeon Cinema minutes after the stabbings.
Inspector David Keen said: "Two men have suffered fatal injuries - these have been inflicted in the heart of the city at a busy time when workers and shoppers would be heading home.
"There are potentially hundreds of witnesses, either people who saw the stabbings or the offender leaving the scene, and I'd urge people to get in touch immediately - they could have vital information.
"A large police presence was quickly on the scene and a man was arrested swiftly."
Forensics and search experts cordoned off several scenes in and around Union Street to preserve evidence.
A spokeswoman for West Midlands Ambulance Service said: "Crews arrived to find two men who had been stabbed and were being given excellent first aid by police officers and passers-by.
"Both men went into cardiac arrest. Crews and the team of medics administered advanced life support to both men but sadly, despite the best efforts, nothing could be done to save them and they were confirmed dead on scene."
Anyone with information is asked to call police on 101.