The bus was heading towards Visakhapatnam after the tourists from Udaynarayanpur area in Howrah district of West Bengal visited Daringbadi in Kandhamal district. Over 70 persons were onboard in the bus.
The bus driver claimed that the mishap occurred late on Tuesday night due to brake failure.
"We left Daringbadi at around 7.30 p.m. and had our dinner before the Kalinga ghat. While coming down from the ghat, suddenly the brake failed and I alerted the passengers. After hitting several electric poles, the bus overturned," said the diver, who also sustained injury in the accident.
Soon after receiving the information, local police teams and fire service personnel rushed to the spot and started the rescue operation. The rescue operation continued till Wednesday morning, the police said.
As per latest report, the deceased were indentified as -- Supriya Denre, Sanjeet Patra, Rima Denre, Mausumi Denra, Barnali Manna and Swapan Gushait.
The injured were admitted to a local hospital at Bhanjanagar for treatment. Among them, 15 were shifted to MKCG Medical College and Hospital in Berhampur due to their critical health condition.
"The patients have been admitted in surgery and orthopaedic departments. Excluding one woman who got head injury, the health condition of others is stable till now. A dedicated team of doctors are treating the patients," said an official of MKCG Medical College.
Meanwhile, State Transport Minister Padmanabha Behera said he has ordered a probe into the bus mishap. Chief Minister Naveen Patnaik mourned the deaths and prayed for the recovery of injured tourists.
"We have seen in the past also that buses from other states met with accidents in the Kalinga ghat as the drivers don't have experience driving buses in such a long ghat area. So, we will issue an advisory to buses coming from other states to choose alternative routes," Behera said.