Bulgaria's education ministry said on Friday that it has singed a 5.9 million levs ($3.4 million/3.0 million euro) framework agreement with local Isubus for the purchase of buses. The deal envisages purchase of buses with between 30 and 34 seats, the ministry said in a notice. The deal was signed on December 21, according to the notice. Isubus submitted the only offer in the public procurement procedure for awarding the contract. Isubus is an official distributor of Japanese commercial vehicle manufacturer Isuzu for Bulgaria.