Police arrested a 23-year-old man who allegedly threatened to kill his 40-year-old ex-girlfriend with a dangerous instrument.

Police said the man allegedly threatened her on three separate occasions, forcibly broke into her Waianae home and hit her while seated in her vehicle.

The incidents occurred May 26, May 27 and May 29.

Police arrested the man on suspicion of first-degree burglary,  kidnapping, two counts of first-degree terroristic threatening and unauthorized entry into a motor vehicle.