Earlier this month, President Vitkor Yushchenko's chief of staff accused Poroshenko and other top government officials of corruption. Those accusations prompted Yushchenko to dismiss Prime Minister Yuliya Tymoshenko's cabinet.
While clearing him of accusations of corruption, Piskun yesterday said Poroschenko's name does appear in five recently opened criminal cases. Piskun said the cases involve allegations that former Security Service members exerted pressure on the judiciary.
Piskun did not say whether Poroshenko would be questioned as a suspect or a witness.