ORLANDO, Fla. — The Florida Highway Patrol is investigating an early-morning fatal crash in Orlando. 

According to troopers, the crash involved a stabbing and a pedestrian being struck by a vehicle. 

The crash happened just after midnight, blocking east-bound lanes for several overnight hours.

Authorities said a 27-year-old man and 30-year-old woman were traveling east on I-4.  While the victim was driving, the two were engaged in an argument.

Officials said the man stopped at the shoulder of I-4 near mile marker 68. Authorities said that's when the woman broke a bottle and struck the victim. 

After the stabbing, the woman got out of the vehicle on the side of I-4 and ran into oncoming traffic. 

She was struck by an east-bound tractor trailer and died at the scene. The man was not seriously injured.

Orange County Sheriff's deputies are investigating the stabbing. 

Authorities have not released any further information.