OPEC's Secretary-General Mohammad Barkindo has died, Mele Kyari, the chief executive of Nigerian National Petroleum Corp said on Wednesday (July 6).
Barkindo, who was 63, was due to step down at the end of this month after six years as OPEC's secretary-general.
"We lost our esteemed Dr Muhammad Sanusi Barkindo," Kyari said on Twitter, adding that he died late on Tuesday.
The death was a "great loss to his immediate family, the NNPC, our country Nigeria, the OPEC and the global energy community," he added.
Mohammad Barkindo, the secretary general of the Organization of the Petroleum Exporting Countries (OPEC), has passed away unexpectedly at the age of 63.