Judges serving on Ukraine's Constitutional Court are under investigation for voting in favor of broadening the powers of former President Viktor Yanukovych in 2010.
In a televised interview on April 17, Ukraine's acting Prosecutor-General Oleh Makhnitskyy said a probe had been launched against judges who approved a return to the country's 1996 constitution, which granted the president more powers.
There are 48 judges on Ukraine's Constitutional Court.
Makhnitskyy added that other judges, prosecutors, and investigators involved in the prosecution of participants in mass antigovernment protests that toppled Yanukovych in February are under investigation, as well.
Meanwhile, media reports in Ukraine and Russia say that Yanukovych, who fled to Russia, may return to his native city of Donetsk, in eastern Ukraine, on April 20.
Pro-Russian separatists have seized government administrative buildings in the city and proclaimed the "Donetsk People's Republic."
According to Makhnitskyy, Yanukovych will be arrested immediately if he returns to Ukraine.
Based on reporting by UNIAN and Channel 5