Police were called to St Catherine's Close, near Hastings High School, at 3:15pm after reports a 16 year old had been injured.
Officers said it was alleged the victim had sustained a single stab wound, inflicted by another boy known to him on 20th May 2021.
The injured boy was taken to hospital where he remains in a stable condition.
Two 16-year-old boys have been arrested in connection with the incident and remain in police custody.
A scene preservation is currently in place and officers remain at the scene carrying out enquiries into the incident.
Officers are asking members of the public who have information to call 101 or visit https://www.leics.police.uk/ro/report/ocr/af/how-to-report-a-crime/
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