YAOUNDe:  Thirty-four Cameroonian soldiers from the elite Rapid Intervention Brigade were missing Monday, a day after an army vessel capsized off the country's southeastern coast, reports AFP.

The ship was carrying 37 people, including crew, and was on its way to the city of Bakassi for refuelling when it sank on Sunday morning, Defence Minister Joseph Beti Assomo said in a statement.

"Thirty-four personnel are missing till now," he said. "Three soldiers were rescued but the boat seems to have sunk right down."

He said the circumstances of the accident were not yet clear but the waters were very choppy when it happened.

The Rapid Intervention Brigade is in the front line of Cameroon's fight against Boko Haram jihadists in the north.

Though Boko Haram originated in Nigeria, the Islamic State-affiliated group has carried out frequent attacks in Cameroon, Chad and Niger.