KYIV, Aug 9 – Director of the National Anti-Corruption Bureau of Ukraine (NABU) Artem Sytnyk has called suspects in the so-called "Rotterdam+ formula" case to cooperate with investigators.

"I would like to appeal to all the suspects... we urge them to cooperate," Sytnyk said at a press conference in Kyiv on Friday.

"Taking this opportunity, I would like to address all the suspects in respect of whom a notice of suspicion was made yesterday. We cannot limit their activity in the Facebook [social network], but we want to remind them that there is a criminal process, which has a code that provides protection methods," Sytnyk said.