A second teen was arrested on suspicion of the assault after a 13-year-old boy was stabbed in Old Trafford as officers were authorised to use additional stop and search powers in the area.
The emergency services were called to Seymour Park at around 5.10pm on Saturday to a report of the attack.
A 13-year-old boy was discovered stabbed and taken to hospital in what was described as a stable condition.
After the attack, police arrested a 14-year-old boy on suspicion of assault.
And on Sunday, it was revealed a 13-year-old boy was arrested as well.
Police introduced additional stop and search powers for the day in Seymour Park and its surroundings, including Ayres Road, Humphrey Road, Northumberland Road and Seymour Grove.
These powers authorised officers to stop and search anyone in the area.
Chief Inspector Shoheb Chowdhury, of GMP Trafford, said: "We absolutely understand the impact events, like that of yesterday, can have on our communities and simply won’t tolerate it.
"This force is committed to fighting, preventing and reducing crime whilst keeping people safe and that is our rationale for authorising today’s Section 60.
"Members of the public can expect to see extra officers in the area and there is a possibility they themselves could be stopped and searched. We thank them in advance for their cooperation."
People can contact police on 101, or use the LiveChat on gmp.police.uk. Use 999 in an emergency.
People can also contact Crimestoppers anonymously on 0800 555 111.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article