This handout picture obtained on March 22, 2019, courtesy of Igor Gryb, father of Pavlo Gryb, shows Ukrainian citizen Pavlo Gryb in a military court in the southern Russian city of Rostov-on-Don in 2017. - A Russian court on March 22, 2019, convicted an ailing 20-year-old Ukrainian man of terrorism charges and sentenced him to six years in prison, sparking an outcry in Kiev. Pavlo Gryb, who suffers from serious ailments including liver cirrhosis, urgently needs surgery and may die in a Russian prison, his family says. (Photo by Igor GRYB / FAMILY HANDOUT / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / FAMILY HANDOUT / IGOR GRYB" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS