Victims of Wednesday's random stabbings in Renfrewshire have been describing their anger and fears following the attacks.
Officers have been seeking witnesses to the attacks
One man, who would only be named as Francis for fear of reprisals, was
stabbed in Paisley.
He has told of the shock after he realised he had been attacked when his top soaked through with blood.
Three other men were stabbed in the town and a fifth man was later attacked in a pub in nearby Renfrew.
Francis, a 29-year-old father, was stabbed three times after he stepped off a bus on Lochfield Road.
He said: "I was totally shocked. I had never been stabbed before and I couldn't believe something like this could ever happen to me.
"I will always be looking over my shoulder wherever I go.
"If this guy isn't caught there's a real danger that he could kill somebody."
Francis said he had stepped off the number 66 bus and was halfway down a set of stairs towards the town's library when he felt a pain in his leg.
"At that point I realised there was somebody behind me and the next thing I knew I'd been stabbed three times.
"I dropped the shopping bags I was carrying and turned round to see that the guy had fled.
"He turned round and I got a look at his face and he then swore at me. I looked at the top I was wearing and saw it was covered in blood. I realised then that I had been stabbed."
The industrial estate worker then continued walking towards his girlfriend's knowing he could apply pressure to the wounds, one of which was one inch deep.
He added: "If my picture was released and this man is still at large there's a chance he could strike again and I've got my family and friends to consider.
"I'm really, really angry - it's like a rage building up inside you."
The suspect is described as white, mid-20s to early 30s, about 5ft 8in to 6ft, of scruffy appearance with short dark hair.
He was wearing a dark bomber-style jacket and dark jeans.
One victims shows where he was stabbed
Police were on the streets of Paisley on Thursday evening in an effort to trace potential witnesses and reassure the public.
Renfrewshire Council driver, Jim Porter, 44, was stabbed in the back as he got off a number 20 bus in Marjory Drive in the Gallowhill area of Paisley.
The father of two said: "I got about two steps off the bus when I felt something like a punch in the back.
"I turned around and challenged the guy who had done this and asked him what he was doing. He mumbled something and then ran off. I noticed he had a panicky
expression, like he was high on drugs."
It wasn't until Mr Porter arrived home minutes later that he realised he had been stabbed.
"I told my wife I'd been stabbed and she thought I was joking. But when I took my jacket off there was blood everywhere. I'm still quite shaken, but at the time I was really quite angry."
Mr Porter says he feels very lucky to be alive.
He said: "If the attacker isn't caught very soon, somebody could end up in a much worse condition or dead.
"I don't know what the guy was thinking, because it was a totally unprovoked assault. He just chose me and went for me."
Police have warned the suspect may strike again.