missing

Most of the 18 who survived were injured and some had suffered severe burns.

The Natrona County Sheriff's Office said search efforts include tracking experts, search dogs, mounted searchers and drones.

Tuesday, November 19th, 2019, the Highland Park Community Church will be holding a prayer vigil at 7:00 pm.

Two new search dog teams were being used Monday, with another pair possibly on the way.

The search area has expanded to 228 square miles by law enforcement, drones and trained search personnel, he said.

Experienced mounted search and rescue crews are working with Natrona County sheriff's deputies to search technically difficult terrain.

Anyone with information on his whereabouts is urged to contact the Riverton Police Department.

Anyone with information on Mark Strittmater is asked to contact the sheriff's office at 307-324-2776.

Officials say he sent his girlfriend a text at about 11 a.m.

He did not return home by Sunday evening, and a report was filed with the sheriff's office.