Verkhovna Rada Human Rights Commissioner Liudmyla Denisova has said that her Russian counterpart Tatyana Moskalkova arrived in Russian-occupied Crimea on Tuesday, once again violating the rules for crossing the Ukrainian border, which could result in a new ban on her entry into Ukraine and will threaten the mutual visits by Ukrainian and Russian ombudsmen to citizens of the two countries held in pretrial detention facilities or prisons.

"The Russian ombudsman arrived today in Kerch, once again violating the rules for crossing the Ukrainian border. For such actions she was banned to enter Ukraine. Restrictions were lifted by the president of Ukraine to fulfill agreements with the president of the Russian Federation on reciprocal and simultaneous visits to prisoners. Violation of the legislation of Ukraine by the Russian ombudsman may lead to a new ban on her entry into Ukraine and threaten mutual visits," Denisova wrote on her Facebook page on Tuesday.

She also recalled that due to the terrorist attack at the Polytechnic College in Kerch on October 17, in which dozens of students and school personnel were killed and injured, she turned to her Russian colleague and expressed her readiness to make a joint visit to "Russian-annexed Crimea and fulfill our humanitarian mission."

"I received no answer," Denisova said, adding that all of Ukraine and she personally are ready to provide any support to the victims of the terrorist attack and their families.

"Ukraine mourns with Crimea. Each of us is concerned about the tragic events that occurred on October 17, because Crimea is Ukraine. And their loss is our common grief," she said.

She also recalled that the Prosecutor's Office of the Autonomous Republic of Crimea had opened criminal proceedings on counts of a terrorist attack.

"Law enforcement officers are carrying out a detailed investigation into the tragic events at the Kerch Polytechnic College, which will allow Ukraine to have the results of its objective investigation," Denisova wrote.