A 15-year-old boy has been arrested after two paramedics were assaulted in Melbourne’s north going to the aid of a patient.

One ambulance officer underwent surgery on Friday after the attack at Hobbs Crescent in Reservoir at about 6:30pm Thursday.

Police arrested the teenager on Friday at about 1pm at Banksia Street in Ivanhoe.

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The paramedics were trying to care for a disoriented elderly man, when three bystanders became aggressive.

One paramedic suffered a suspected broken foot, cuts and bruises after he was kicked, punched and repeatedly knocked to the ground by a man and two women.

He underwent surgery this morning.

Another paramedic was struck on the head when she went to the aid of her colleague.

The attackers then got into their car and rammed the ambulance before speeding from the scene.

Mick Stephenson, the acting general manager of emergency operations at Ambulance Victoria, said they would not tolerate violence, threats or abuse towards paramedics.

“It’s disgusting. This a gutless attack on paramedics as they were in the community going to the aid of a patient,” Mr Stephenson said.