West Midlands Police has praised the public response in assisting officers with their inquiries, after the stabbings in Birmingham on Friday evening.
All cordons have now been lifted from the scene on Union Street.
"We have had a fantastic response from the public so far and their information has proved vital to our investigation."
"Early inquiries suggest that this wasn't random. The attacker appears to have known his victims.
"Our inquiries continue and if there is anyone who saw something on Friday evening and hasn't yet come forward we urge them to call us now on 101."
More top news
33 people have been assessed for possible carbon monoxide poisoning after an incident at an industrial premises this afternoon.
Occasional rain easing. Feeling cold and damp.
Rain easing for many but staying cloudy.