KIEV, Sept. 20 - A 10-day investigation showed no trace of corruption among close allies of President Viktor Yushchenko, Prosecutor General Sviatoslav Piskun said Tuesday.

Petro Poroshenko, the former national security chief, Oleksandr Tretiakov, Yushchenko's top aide, and Mykola Martynenko, the leader of Yushchenko's Our Ukraine groups in Parliament, were acquitted of all charges, Piskun said.