The service took place at the St. Ann’s RC Church, St Ann’s Road, St Ann’s.
However as mourners paid their respects, family members became irate during the ceremony.
As the coffin was being carried to the hearse to take Hargreaves to the cemetary, relatives of his father, Nigel Hargreaves, and those who were related to the boy through his mother, Natasha Gabriel, argued with each other over who should be allowed to view the body before the coffin was closed.
As tempers flared other mourners had to step in and take away two male relatives who got into a heated argument.
After the men were separated, the coffin was taken away in the hearse.
Over a week ago, Hargreaves hit his head while horse-playing in a dormitory at St Michael’s School for Boys in Diego Martin.
The boy was taken to the St James Medical Complex where he was treated, but he died at about 10.25 that night.