President Victor Yushchenko wrote a letter to Prime Minister Yulia Tymoshenko with the request to establish a state commission to investigate May 2 blast that occurred in Savings Bank office in Melitopol, Zaporizhzhya region and resulted in casualties. According to the President`s press-office, he also requested the Prime Minister to arrange provision of help to victims of the blast and inhabitants of living block the office was situated in.