Five people have been killed and several more injured after an explosion on Petrobras-leased offshore oil and gas platform in Brazil.

Search-and-rescue operations are continuing after the explosion on-board the floating production storage and offloading (FPSO) unit, Cidade de Sao Mateus.

BW Offshore is operating the unit for Petrobras. Production was stopped and the unit has been shutdown.

"This is a tragic day, and our primary focus now is on the crew and their families."

The FPSO is operating on the Camarupim and Camarupim Norte fields in Espirito Santo littoral, 120km from the coast.

BW Offshore said 74 people were on-board the unit, with four crew still missing.

BW Offshore CEO Carl Arnet said: "This is a tragic day, and our primary focus now is on the crew and their families. We cannot rest until the last four of our men are found.

"We express our gratitude to Petrobras and the Brazillian authorities for the tireless efforts in this time and wish to thank our peers and partners for their support."

The latest incident is expected to affect an advertising campaign planned by Petrobras to promote its offshore achievements.

Petrobras has recently been hit by a corruption scandal that has led to the arrest of three of the company’s former officials and the resignation of its CEO, as well as five senior executives.

Image: Cidade de São Mateu. Photo: courtesy of BW Offshore.