TULSA, Oklahoma - The Tulsa Police Department is investigating a deadly officer-involved shooting Sunday in north Tulsa. 

It happened near Pine and Harvard Sunday afternoon. Investigators said officers were simply helping a driver who was stuck in the road when it quickly escalated.

Police said it all started when a training officer and his trainee pulled up to a car on the side of Pine Street near Harvard.

"We don't know what was wrong with the car; we don't know if it was out of gas; we don't know if it was something else that made it inoperable," Sgt. Shane Tuell said.

Investigators said a woman was waiting with the car. She told the officers she was OK, but the car wouldn't move, police said. She said her boyfriend would be back soon to help.

"When the boyfriend did return, officers got on the radio and said we need more cars here," Tuell said.

Tuell said a man rode up to officers on a bicycle looking upset. They said he dropped the bike and pulled out a gun.

"Completely unexpected - we still don't know why he produced a firearm on the officers," Tuell said.

Officials said as many as three officers shot at him, hitting him several times. They believe the man might have fired at least once at officers.

None of the officers were injured, and they said they tried to save the man's life. An ambulance rushed him to the hospital, but he died of his injuries.

Now, officers are left to piece together body camera and dash camera footage to try and figure out what happened.

"There was nothing up until he arrived, and produced a gun on the officers; there was nothing at that point that really alarmed the officers," Tuell said.

The woman who was driving the car is being questioned.

The name of the man who was shot has not yet been released.