Police officers had been attending a White Ribbon Day function to help prevent violence against women when they were diverted to an alleged domestic violence incident in Mosman on Sunday.

Following a call from a neighbour, officers arrived at the couple's Muston Street unit to find the man out the front of the apartment block and his partner throwing his belongings out the window.

As police approached him, he smashed a glass panel in the front doors of the apartment block and allegedly started attacking the officers.

"Police will allege the man spat at, bit and punched the attending officers," a spokesman said.

A leading senior constable had her arm broken by the man and a female constable was hit in the knee and sustained soft tissue damage and a possible dislocation, the spokesman said.

A probationary constable was allegedly bitten in the hand and is undergoing blood tests. A male constable also allegedly suffered swelling to both arms and leg grazes.

The accused man suffered some cuts and bruises.

"The police officers definitely came off second best," said a police spokesman.

The officers sought urgent back up and a truck carrying northern beaches officers, who had been at a White Ribbon Day function nearby, quickly diverted to the unit block to help.

They used capsicum spray to subdue the man and arrest him.

He was charged with numerous assault and malicious damage matters and will appear in Central Local Court on Monday.