Merseyside police confirmed that detectives in Sefton are investigating the attack, which took place on Saturday 3 October at about 22.20.
The police believe that it was a targeted street attack in which a man was stabbed to death with a kitchen knife.
The officers assume that the man was targeted during the further investigation of the attack.
Surveillance, witness and forensic investigations are underway and we would like to speak to anyone who has information and has not yet come forward.
Officers and the emergency services located the man with a small stab wound to the abdomen that was not life-threatening. He was taken to hospital for treatment.
The victim, a man in his 60s, contacted police to say that he had been stabbed by a small kitchen in Merton Road, Bootle.
Detective Inspector Cat Walsh said: “Fortunately, the victim’s injuries were not more serious, but as we have seen, the consequences of carrying a knife can be catastrophic. We believe that this was a targeted attack and we are still investigating why this happened.
“According to our investigations, we believe there were people in Merton Road at the time of the attack who have not yet come forward. I would urge them to do so as soon as possible, either directly or anonymously through Crimestoppers, and also anyone who lives nearby and has a security camera or dashboard.
“What you have seen, recorded or perhaps heard since then may be the key to removing a dangerous offender from the community.
Anyone with information is asked to contact us via the Social Media Desk on Twitter @MerPolCC or Facebook Merseyside Police CC with the subject 20000599399.
You can also share information anonymously via the independent charity Crimestoppers on 0800 555 111 or by filling out their online form here.