KIEV, Sept. 12 - President Viktor Yushchenko, introducing Ihor Drizhchaniy as the chief of the SBU security service on Monday, called for a quick investigation into allegations of corruption that had triggered the recent dismissal of his first government.

Drizhchaniy was appointed on Sept. 8, hours after Oleksandr Turchynov, the previous SBU chief and a close ally of former Prime Minister Yulia Tymoshenko, resigned following the government reshuffle.