As the fire truck was attempting to pass, the van attempted a left turn and the vehicles collided, he said.
Both the driver and a passenger in the van were killed, he said.
Their names, ages and hometowns were not immediately available.
The driver of the fire truck was also hospitalized as a precaution with nonlife-threatening injuries, West said. The firefighter's name also was not immediately available.
Troopers closed Oklahoma 16 about 2 1/2 hours after the crash.
A report on the incident had not been competed as of Sunday night and additional details were not available.
The Olive Fire Department is a volunteer department based in Drumright.
Written by Tulsa World