Eight men have been arrested in connection with the stabbing of a father in the street.
A video has been posted on Twitter showing the attack which, the police said, has to be removed as it must be devastating for his family to watch.
Karl Gallagher has been named by police as the victim, who was attacked outside a shopping mall in Smethwick on Sunday afternoon. West Midlands police said that Mr Gallagher, 31, leaves behind a daughter. Despite efforts from a paramedic team he died at the scene and a post mortem will take place later.
Four men aged between 19 and 21 have been arrested on suspicion of murder while 3 others aged 20, 21 and 22 are being held on suspicion of assisting an offender. A further man, aged 24, has been arrested on suspicion of obstructing the police.
Officers were called to West Cross shopping centre at 4.40pm on Sunday where they discovered Mr Gallagher with fatal knife injuries.
Meanwhile his family paid tribute to Karl, saying he was a “proud and loving father” and “his family and friends are devastated”.