A man arrested on suspicion of murder has been released on bail while police inquiries continue.
The man, in his 60s, was arrested last week after a 56-year-old man was fatally stabbed in Great Yarmouth, Norfolk, on 7 November.
A post-mortem examination revealed that the victim died from a single stab wound.
Police are continuing to appeal for information following the incident in South Market Road at about 22:20 GMT.
No further action will be taken against a woman in her 50s who was arrested in connection with the investigation and later released, police said.