A 23-year-old Papakolea woman suspected of carjacking a city ambulance at the Kaka'ako Waterfront Park Thursday was charged today with second-degree robbery and assault.

Saralyn Lopes remained in a police cellblock tonight on $20,000 bail. She is scheduled to make her initial court appearance Monday.

Lopes is accused of getting into the front seat of an ambulance and driving off while two mobile intensive care technicians were working on a female patient in the back of the vehicle.

One of the paramedics managed to get into the front seat of the ambulance and prevent the woman from driving out of the park's parking lot, police said.

Once the ambulance came to a stop, the 32-year-old paramedic shoved the woman out of the vehicle and she began to assault him. Police arrived at the scene and arrested the woman without further incident.

No one was seriously injured, police said.