At least 13 people were killed and two more were injurer after a church bus collision with a pickup in Texas, the U.S., USA Today reported.

The church van was carrying members back from an annual spring retreat when the accident occurred. 

Earlier it was reported that 12 people were killed and two others injured.  The driver of the truck also survived. It was not clear late Wednesday which of the injured had died.

An investigation is underway.