"NABU [National Anti-Corruption Bureau] is an independent body, the president commented on the Nasirov case," he wrote.
This was Poroshenko's answer to a question about Nasirov's detention asked by a journalist in Kharkiv.
Earlier, NABU and SAP agents arrived at Feofania hospital to serve an indictment for criminal offence against Ukraine's chief taxman Roman Nasirov. The doctors barred the investigators and prosecutor from entering the ward saying Nasirov had allegedly suffered a heart attack.
Nasirov is accused of taking unreasonable decisions on restructuring rental fees for the extraction of minerals, which helped Ukraine's fugitive MP Oleksandr Onyshchenko implement corruption schemes he is being charged with.
On March 16, the NABU raided the office of Verkhovna Rada MP Oleksandr Onyshchenko as part of a pre-trial investigation into abuse of office during the sale of natural gas extracted jointly with Ukrhazvydobuvannia SE.
Later, the NABU requested the Prosecutor General's Office (PGO) to strip Onyshchenko of immunity. Moreover, the NABU and the PGO claim Onyshchenko is involved in the embezzlement of 1.6 billion hryvnia ($64.02 million).
On June 16, Prosecutor General Yurii Lutsenko issued a motion requesting Verkhovna Rada's consent for criminal prosecution, arrest, and pre-trial detention of Onyshchenko. On July 5, the parliament approved the detention and arrest of the lawmaker.
It turned out Onyshchenko was in the U.K. at that moment and had already applied for political asylum.
On Dec. 1, 2016, the Security Service of Ukraine (SBU) announced it suspected fugitive MP Onyshchenko of high treason. As noted, the MP acquired Russian citizenship in exchange for cooperation with Russian authorities to destabilize the situation in Ukraine. On the same day, Onyshchenko said he had provided compromising materials against President Poroshenko to the American intelligence authorities.