The baby of a pregnant woman who was stabbed in the street in Sutton Coldfield has been born in hospital.
A 40-year-old woman was stabbed multiple times by a man she knew in the town centre shortly after 3:15pm.
Two passerbys - both men - sustained minor injuries to their hands after they intervened to help her.
A 41-year-old man was immediately detained at the scene in connection with the attack.
A spokesman for West Midlands Police said the baby was "doing well" but it's mother remained in critical condition in hospital.
The woman was air lifted to hospital shortly after 4pm.
West Midlands Ambulance Service said an ambulance, paramedic area support officer, a BASICS doctor and the Midlands Air Ambulance from Cosford attended the scene.
UK news in pictures
UK news in pictures
1/18 23 June 2017
British Prime Minister Theresa May addresses a news conference at the EU summit in Brussels, Belgium, June 23, 2017
2/18 22 June 2017
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England players celebrate with the trophy after the final match of the FIFA U-20 World Cup 2017 between Venezuela and England at Suwon World Cup Stadium in Suwon, South Korea
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Great Britain's Alistair Brownlee celebrates winning the Elite Men Columbia Threadneedle World Triathlon Leeds
Danny Lawson/PA Wire
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Two men drink beer outside the Southwark Tavern which reopened for business today next to an entrance to Borough Market which remains closed in London
A service spokesman said: "Crews treated one female patient at the scene before she was airlifted to hospital.
"Two further patients were treated for minor injuries and taken to hospital by land ambulance."
Speaking to reporters Chief Inspector Julian Harper said: "They are believed known to each other so this was what we call a domestic-related situation.
"As such no other members of the public should be alarmed and should be reassured that we have what we believe is the only person involved in this incident."
He said if either the mother or the child dies it would become a murder investigation.
He praised the two men for "bravely [stepping] into what was a dangerous and volatile situation with complete disregard for their own safety".
A police cordon remains in place in the town centre with around half a dozen officers at the scene outside the Sutton Coldfield Baptist Church Centre where the stabbing occurred.
Anyone with information about the incident is asked to call police on 101 or Crimestoppers anonymously on 0800 555 111.
Additional reporting by PAReuse content