MARTIN COUNTY - OSHA is now investigating the gas explosion that sent two oilfield workers to the hospital on Tuesday.
The blast happened just after 3 p.m. on FM 829.
Officials say an Arguijo Oilfield Services crew was digging a trench when they hit a pipeline and caused the blast.
Seven people were hurt.
One was taken to midland memorial with possible internal injuries and another was flown to Lubbock with burns.
Five other workers had minor injuries.