The helicopter that crashed along Chevron oil platform, off the Angolan coast, claimed the lives of four people with two declared missing.

The helicopter departed from Malongo port in Angola’s Cabinda province on Monday at 1523 local time to make the short journey to the Tombua-Landana offshore oil platform, but never arrived.

“The helicopter did not reach its intended destination. It was carrying five passengers and one pilot,” Chevron said in a statement, adding that one of the passengers was an employee while four others were contractors.

“Extensive search and rescue activities continue for those who remain missing.” Reuter reported

There was no information from chevron as to whether there was impact of oil production from the crash or the search and rescue operation, which involved 19 marine vessels and three helicopters.

Chevron did not say if there was any impact on oil production from the crash or the search and rescue operation, which involved 19 marine vessels and three helicopters, reports Reuters.

Angola competes with Nigeria to be Africa’s largest oil exporter, shipping around 1.7 million barrels per day, mainly to Asian markets.