President Donald Trump's administration is pushing forward with plans to sell up to a dozen aircraft to Nigeria's air force for the fight against the extremist group Boko Haram, sources said on Monday, in a deal that could be worth up to $600 million.

The Super Tucano A-29 aircraft, an agile, propeller-driven plane with reconnaissance and surveillance as well as attack capabilities, is made by Brazil's Embraer. A second production line is in Florida, in a partnership between Embraer and privately held Sierra Nevada Corp of Sparks, Nevada.

Former President Barack Obama's administration originally agreed on the sale, but delayed it after incidents including the Nigerian Air Force's bombing of a refugee camp in January that killed 90 to 170 civilians.

The Trump administration wants to push ahead to boost Nigeria's efforts to fight Boko Haram and bolster hiring in the United States by defense firms.

"We've been told that the administration is going to go forward with that transaction," a congressional aide said.

Formal notification of the deal has not yet been sent to Congress but is expected shortly. Trump has said he plans to go ahead with foreign defense sales delayed under Obama by human rights concerns.

A senior Nigerian military source in Abuja, Nigeria's capital, confirmed that the sale would go ahead and said it would also involve training, surveillance and military intelligence "to support ... the ongoing insurgency war."

The Super Tucano costs more than $10 million each and the price can go much higher depending on the configuration. It is powered by a Pratt & Whitney Canada PT 6 engine.

Trump's plan to move ahead with the Nigerian sale was first reported on Monday by the Associated Press.

The U.S. congressional source said rights concerns remain, despite support for the sale from some lawmakers. There are also questions about whether Nigeria will be able to pay the full $600 million for the aircraft, equipment, training and support.

U.S. officials said Buhari raised frustration with delays in the sale in a phone call with Trump in February.

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OK

How many finally does this trump sell of weapons have? What of the one apc told us trump gave to buhari while he was in comma, hope this is the fullstop