 Recently, there have been unverified reports that Armenia received up to ten Su-27 from Russia in 2006.This may have been presaged by an Azeri source which reported in October 2005 that Armenia had bought "10 fighter jets", but that, according to Azeri military sources, only 2–3 of the aircraft were Su-27; the remainder were purportedly Su-25 jets and Mi-24 attack helicopters.Ostensibly, these would have been procured on preferential terms under the provisions of the 2002 Collective Security Treaty Organization (CSTO) agreement.