ACCRA, Ghana — A military helicopter crashed in Ghana on Wednesday, killing all eight people on board, including the West African country's defense and environment ministers and two other top officials, the government said.

The crash was one of Ghana’s worst air disasters in more than a decade.

The Ghanaian military said the helicopter took off in the morning from the capital, Accra, and was heading northwest into the interior toward the gold-mining area of Obuasi in the Ashanti region when it went off the radar. The wreckage was later found in the Adansi area of Ashanti.

The cause of the crash was not immediately known, and the military said an investigation was underway.

Defense Minister Edward Omane Boamah and Environment Minister Ibrahim Murtala Muhammed were killed, as well as Sam

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