Q: In this task, you are given an article. Your task is to summarize the article in a sentence.
A murder investigation is under way after Frankie Cooper was knifed in Princess Square in Newcastle city centre at about 13:20 GMT on Monday 20 February.
Mr Cooper, who was from the Newcastle area, died in hospital on Saturday.
Two teenagers charged with assault remain in custody pending court appearances.
A:
A 22-year-old man who died five days after being stabbed on Tyneside has been named by police.