Two men have been stabbed to death in Birmingham city centre.
West Midlands Police said one man was stabbed outside Sainsbury's in Martineau Place and the other was found slumped near Boots in Union Street.
Officers arrested a man near the Odeon cinema in New Street minutes after the incident and forensic teams had cordoned the area off, the force said.
The police are appealing for any witnesses to the stabbings, which happened at 17:50 GMT, to come forward.
Officers carried out emergency first aid on both men, who are believed to be in their 40s, but both were pronounced dead at the scene, the force said.
Insp David Keen said: "There are potentially hundreds of witnesses, either people who saw the stabbings or the offender leaving the scene."
"I'd urge people to get in touch immediately - they could have vital information."