A Broward Sheriff's deputy has ``life-threatening'' injuries after crashing his cruiser into a tree as he traveled south on I-95 in Pompano Beach.

Officials say the crash occurred early Wednesday morning as the deputy was heading to work.

The 12-year veteran of the department was taken to Broward Health North, where he was undergoing treatment.

It was not immediately known what caused the crash. The southbound lanes of I-95 near Copans Road were closed for more than two hours while authorities investigated and cleared the scene.  Traffic quickly backed up into Boca Raton.