Two people are dead and two were hospitalized with serious injuries after back-to-back wrong-way crashes on Florida's Turnpike in Miami-Dade County early Sunday morning, the Florida Highway Patrol said.

According to FHP, the first crash happened on the northbound lanes of the Turnpike near Bird Road around 4 a.m., where a blue Honda that was driving south in the northbound lanes collided head-on with a silver Toyota.

Both vehicles became disabled and were blocking the roadway, which led to the second crash when an oncoming white Toyota — that was also driving south in the northbound lanes — collided into the two disabled vehicles along with a responding FHP vehicle, the agency said.

Video shared by the social media page ONLYinDADE showed the moments right before the second crash.

The Honda driver and the silver Toyota driver from the initial crash died at the scene, FHP said. Meanwhile, the two occupants in the other Toyota were airlifted to Kendall HCA with serious injuries. FHP said the trooper on scene was outside of their vehicle at the time of the second crash and was not injured during the incident.

All northbound lanes were shut down, and traffic was diverted onto Bird Road as troopers worked the scene.

FHP said it's not going to identify the people involved in either crash due to an ongoing investigation. However, one of the victims' family members identified 23-year-old Gustavo Adolfo Palma Romero as the man struck by one of the wrong-way drivers. His family said he dreamed of "building a better family" and was days away from his 24th birthday. 

The FHP said it is currently unclear whether the two wrong-way drivers knew each other or were connected. 

Authorities also do not know where the drivers entered the turnpike.

Florida's systems to minimize wrong-way crashes

Throughout the state, multiple projects are in place to avoid wrong-way crashes, such as detection-based countermeasures, enhanced signage and markings, as well as the use of dynamic message signs to help inform drivers.

Officials told CBS News Miami that the goal of these projects is to "detect, alert and deter these moves before a crash occurs."

At this time, FHP has not identified the people involved in the crashes and the circumstances surrounding them are still under investigation.