"The publication of details of foreign journalists on the Mirotvorets website was a big mistake," the president was quoted as saying by his administration on its Facebook page.
Speaking at a press conference in Kiev, Poroshenko assured Western journalists they "have nothing to fear in Ukraine." "I made corresponding orders to security chiefs and law enforcement agencies."
The Ukrainian prosecutor’s office said last month it had launched a criminal inquiry into the publications. The OSCE Representative on Freedom of the Media, Dunja Mijatovic, said reporters should not be harassed for doing their job and urged Kiev on Thursday to speed up the probe.