A Melbourne father has died after he was allegedly bashed near a primary school attended by his son.

The 63-year-old Clyde North man died in hospital on Thursday morning, almost a week after he was allegedly attacked at a reserve behind Strathaird Primary School in Narre Warren South last Friday.

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Two men allegedly assaulted the victim with their fists and a pole or metal torch about 3.15pm, shortly before school pick-up.

Witnesses told 7NEWS hundreds of students and parents saw the alleged attack unfold.

“These two 20-year-olds were yelling at this man and then all of a sudden he was hit to the ground,” one witness said.

The Herald Sun reported the man’s son attended the school and witnessed the attack.

The father was rushed to hospital in a critical condition but died from his injuries six days later.

Police believe the victim and the alleged attackers were known to one another.

A 21-year-old man of no fixed address and a 22-year-old Narre Warren South man were charged with recklessly causing serious injury before the man’s death. 

Police said further charges will be considered following the results of a postmortem examination.

The reserve, located metres from the school, features a large oval and is popular with local dog walkers.

It is also close to a childcare centre and surrounded by residential homes.

A father with two children at the school said families had been shaken by the incident.

He said the school had sent several notifications encouraging anyone affected to seek support.

“When you hear something happen to your kids’ school, it’s always stressful,” he added. 

A Department of Education spokesperson said authorities were aware of the “distressing incident” and their immediate focus was “supporting the school community”.

“The safety and wellbeing of students and staff is always our priority – those who witnessed the incident have been offered wellbeing support and the school is working closely with families,” the spokesperson said. 

Victoria’s Deputy Premier Ben Carroll described the incident as a “complete tragedy”.

“What occurred here is a complete tragedy, and to think that it was witnessed by young children makes the tragedy even so much more worse,” he said. 

Both men remain in custody and are expected to return to court in July.

The investigation remains ongoing.