Habibur Masum, who lives in Oldham and known to the victim, is still at large and members of the public have been urged not to approach him if seen but to call 999 immediately .
A supermarket owner attempted to save the victim after finding her lying face down on the pavement moments after she was fatally stabbed in Bradford city centre.
Geo Khan has recalled his shock at what he witnessed on Saturday afternoon in Bradford as police continued to search for wannabe influencer Habibur Masum, 25.