WEST COVINA — Police arrested a man Wednesday on suspicion of breaking into his ex-girlfriend’s home, robbing her and assaulting her, authorities said.

The incident was reported about 7:40 a.m. in the 1700 block of East Nanette Avenue, West Covina police Lt. Ron Mitchell said.

The suspect, whose name was not available Wednesday afternoon, arrived at the woman’s home and forced his way in, the lieutenant said.

He then assaulted the woman as he demanded her cell phone, purse and money, Mitchell said.

The woman saw the man leave her home and drive away, he said, and she followed him in another car being driven by her mother.

The mother and daughter chased the man until they were able to flag down an officer, who arrested the suspect and recovered the woman’s property, Mitchell said.

Police jailed the man on suspicion of burglary, robbery and domestic violence.