The State Department informed Congress late Wednesday it had approved the USD 593 million sale of 12 Super Tucano A-29 ground attack aircraft, a deal that includes supplying the Nigerian armed forces with ammunition, training and aircraft maintenance, a US official said.
The US Air Force last year supplied such aircraft -- bought from Brazilian plane manufacturer Embraer -- to the Afghan military to help it fight the Taliban.
The training that the US intends to provide to Nigerian pilots "would help build the skills and procedures to effectively and responsibly operate the aircraft in accordance with international human rights law and the law of armed conflict," the official said.
The sale was initially unveiled in May 2016 but the Democratic administration of former president Barack Obama froze the deal just before handing over the reins of power to President Donald Trump in January, after the Nigerian military accidentally bombed a camp for people displaced by the conflict in the northeast, killing 112 civilians.
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Boko Haram, which has allied itself with the Islamic State, has been leading a bloody jihadist insurrection in Nigeria since 2009 that has left at least 20,000 people dead and forced another 2.6 million people from their homes.
Thousands of women and girls have been kidnapped and forced into marriage with Islamist insurgents or made to carry out suicide bomb attacks.
Last week, the military was ordered to strengthen its response to Boko Haram after 69 people were killed in an ambush.