Following an arms embargo on Nigeria by the United States, Nigeria has turned to Russia for arms purchase.

It is unclear if Russia has granted Nigeria's request, following an arms embargo by the United States.
Source: http://www.ereporter.com.ng/index.php/national-news/item/1293-boko-haram-nigeria-turns-to-russia-for-arms-bail-out-as-us-refuses-to-sell