HOUSTON -

A truck driver was injured Friday morning, after his 18-wheeler overturned into a ditch.

Investigators said around 5 a.m., the driver was trying to turn onto Bauman Road in a northeast Houston neighborhood when one of the big rig's wheels slipped into a ditch.

The truck was thrown off balance and flipped onto its side.

A small amount of nitrogen was leaking from the truck after the accident. Authorities said the leak was not dangerous and likely came from a safety valve that was lowering the tank pressure.

An ambulance took the truck driver to the hospital after he complained about neck pain.