It is reported by RIA Novosti.
It is noted that the deputies of his party are trying to prevent the security forces.
The agency also points out that at the border control, the investigator handed Poroshenko a subpoena with a subpoena, in which he was named as a detainee.
The ex-president himself at the same time claims that the border guards took away his passport under the pretext of checking.
Earlier it was reported that the plane with Poroshenko on board landed in Kiev.
On January 17, the court is to consider a motion to arrest Poroshenko in a case of high treason.