Teen was on Facebook Live during crash

An 18-year-old girl was live-streaming herself as she drove along a Pennsylvania highway in the moments before the crash that killed her and a passenger.

State police say Brooke Miranda Hughes was broadcasting live video on Facebook while driving slowly in the right lane of Interstate 380 near Tobyhanna.

Both teens died after a tractor-trailer ploughed into the back of their car just after midnight on Tuesday.

The driver of the truck was unhurt.