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The minister has stressed that the 19-year-old Ukrainian citizen suffers from a serious congenital disease and needs daily specific treatment, and there is a direct threat to his life if the relevant medical treatment is not provided.

"Due to unsatisfactory state of Hryb's health and the lack of his access to necessary medications, Ukraine has repeatedly appealed to the Russian side with a request to allow Ukrainian doctors to examine the detainee," Suprun said.

According to her, despite numerous appeals by the Consulate General of Ukraine in Rostov-on-Don and position of the European Court of Human Rights on the need to allow access of Ukrainian doctors to the detained teenager, no agreement has yet been reached with the Russian side.

Read alsoFollowing ECHR request, Ukraine to send doctors to Pavlo Hryb held in Russia’s KrasnodarThe Ministry of Health of Ukraine has identified specialists who shall conduct the boy's medical examination on October 12-15, provide information on his current state of health and the medicines recommended.

The Ministry of Health is in constant contact with doctors, and will inform about the further development of the situation, Suprun said.

As UNIAN reported earlier, a member of the State Border Guard Service's public council, Ihor Hryb, said on August 28 his 19-year-old son, Pavlo Hryb, was missing.

Pavlo reportedly disappeared in Belarus on August 24 after he had traveled to the city of Gomel for a meeting with a Russian girl whom he met on social networks and who had allegedly also flown to Gomel.

Read alsoFSB-abducted Ukrainian teenager arrested by Krasnodar court so far has no access to required medication – lawyerThe youngster's father said Pavlo was supposed to return on the same day. When it did not happen, the father went to Gomel in search for his son. He found out that Pavlo was wanted by the FSB in Krasnodar Krai (Sochi) under Article 205 of the Criminal Code of the Russian Federation (an act of terrorism).

It became known on September 7 that Pavlo was being kept in pre-trial detention center No. 5 in the Russian city of Krasnodar.

On September 13 the court in Krasnodar ruled to arrest Pavlo Hryb until October 17.

On September 15, the Foreign Ministry reported that Hryb was transferred from the detention facility to a medical center. On September 16, he was returned to the detention facility.

Read alsoUkraine MFA: Russia's FSB officially admits abduction of 19-year-old Ukrainian in BelarusOn October 6, lawyer Yevgenia Zakrevskaya stated that the ECHR invited Ukrainian doctors to assess Pavlo’s health condition and to find out whether he receives the treatment required.

"I hope that the Ukrainian Foreign Ministry, the Ministry of Health and the Ombudsperson will do everything to ensure that our doctors get to Pavlo Hryb as soon as possible, while Russia will not dare violate the direct instruction by the ECHR and refuse their access to Pavlo," the lawyer said.

The case of Pavlo Hryb is being personally supervised by Minister of Foreign Affairs of Ukraine Pavlo Klimkin.