JOS, Nigeria (AP) _ A plane carrying a top adviser to Nigeria's military ruler crashed Thursday during landing in this northern city, killing all 12 passengers, the government said.

The victims included Gov. Mohammed Wase of northern Kano state, the home state of Nigeria's ruler, Gen. Sani Abacha. Wase had long been one of Abacha's closest advisers.

The plane reportedly developed engine problems as it landed in Jos, about 465 miles northeast of Lagos, the capital. It lost altitude rapidly, hit an antenna and crashed.

The crash was the second this year with a direct effect on the Abacha government. In January, a plane carrying Abacha's eldest son and several members of Abacha's presidential guard crashed, killing all aboard.

The cause was never determined.