Specialized Anti-Corruption Prosecutor's Office (SAP) plans to seek the arrest and dismissal of the head of the State Fiscal Service Roman Nasirov, SAP said on Facebook on 3 March.
Nasirov is suspected of abuse of power, resulting in grave consequences, the SAP release said.
Prosecutors suspect may try to destroy evidence and flee abroad, said deputy prosecutor-general, the head of SAP Nazar Kholodnytskyy.
"Taking into account the possibility of the suspect to obstruct the investigation and the propensity of the participants of the gas case [involving Oleksandr Onishchenko] to take hiding abroad, we will ask court to warrant Nasirov's arrest and demand his dismissal," he added.
Kholodnytskyy said the investigation of the "gas case" aims to establish and bring to justice all those involved in illicit enrichment schemes, and "above all the organizers and beneficiaries". He also noted that the head of GFS already questioned as part of this production.
Earlier, Nasirov said in an interview that NABU was investigating into the tax affairs of the companies affiliated the fugitive former MP Onishchenko. "Their case is falling apart […] so they want to link it with the GFS to add publicity and save own face," Nasirov said, adding that any lawyer will prove the falsehood of the NABU claims.