The mishap occurred near Chahatapada, about 85 km from here, last night, the police said.
The victims were identified as a teacher of nearby Pabitra Mohan High School Rajanikanta Sahu, his elder brother and a retired head master Ramakanta Sahu and a Middle schhol English teacher Sridhar Majhi.
While the siblings were returning from Angul to their place at Jagannath Prasad, Majhi had joined them at Rairakhol.
The driver of the vehicle, who was pulled out of the badly damaged jeep, was undergoing treatment at VSS Medical College Hospital at Burla.