Members of nationalist movements attend a rally to commemorate the seven-year anniversary of deadly clashes which killed dozens of demonstrators in Odessa, Ukraine, Sunday, May 2, 2021. A total of 48 people died in the 2014 clashes between Ukraine's government supporters and pro-Russia protesters in the Ukrainian city of Odessa, including dozens in a burning building. (AP Photo/Felipe Dana)

Members of nationalist movements and veterans attend a rally to commemorate the seven-year anniversary of deadly clashes which killed dozens of demonstrators in Odessa, Ukraine, Sunday, May 2, 2021. A total of 48 people died in the 2014 clashes between Ukraine's government supporters and pro-Russia protesters in the Ukrainian city of Odessa, including dozens in a burning building. (AP Photo/Felipe Dana)

Members of nationalist movements and veterans attend a rally to commemorate the seven-year anniversary of deadly clashes which killed dozens of demonstrators in Odessa, Ukraine, Sunday, May 2, 2021. A total of 48 people died in the 2014 clashes between Ukraine's government supporters and pro-Russia protesters in the Ukrainian city of Odessa, including dozens in a burning building. (AP Photo/Felipe Dana)

Members of nationalist movements and veterans attend a rally to commemorate the seven-year anniversary of deadly clashes which killed dozens of demonstrators in Odessa, Ukraine, Sunday, May 2, 2021. A total of 48 people died in the 2014 clashes between Ukraine's government supporters and pro-Russia protesters in the Ukrainian city of Odessa, including dozens in a burning building. (AP Photo/Felipe Dana)

Members of nationalist movements and veterans attend a rally to commemorate the seven-year anniversary of deadly clashes which killed dozens of demonstrators in Odessa, Ukraine, Sunday, May 2, 2021. A total of 48 people died in the 2014 clashes between Ukraine's government supporters and pro-Russia protesters in the Ukrainian city of Odessa, including dozens in a burning building. (AP Photo/Felipe Dana)