A pregnant woman has been critically hurt after she was stabbed in a town centre.
Police have praised two men who "bravely" intervened in the disorder in Sutton Coldfield.
The members of the public suffered minor hand injuries.
West Midlands officers were flagged down by passers-by on Trinity Hill following the attack around 3.15pm.
An air ambulance took the pregnant victim to hospital. Pic: Warwick Kay
And a 41-year-old man was immediately arrested over the assault.
A large area has been cordoned off and the pregnant victim was taken to hospital by air ambulance.
Police spokesman Julian Harper said of the incident: "This happened in a busy area.
"But I would reassure the community that a man has been arrested and we are working hard to understand the circumstances that led up to the assault.
"What is clear at this early stage is that two members of the public bravely stepped into what was a dangerous and volatile situation, with complete disregard for their own safety and I commend them for their actions.
"Fortunately they suffered only minor injuries."
Anyone who saw the incident is asked to call police on 101 or the independent charity Crimestoppers anonymously on 0800 555 111.