The Ukrainian authorities reported thwarting a coup attempt: A group had attempted to mount "provocations" in Kiev on Sunday, when the country marks Constitution Day, the SBU intelligence service and prosecutors reported on Monday.
The plans involved occupying parliament during a demonstration and setting up a "provisional government," the report said.
Investigations were proceeding into four men, with two held in custody, the report said. Weapons and ammunition had been found in raids, the report said.
The suspects could face up to 10 years in prison if found guilty. The investigation is being led by the authorities in Ivano-Frankivsk in the west of the country.
A security zone has been declared around the government quarter in Kiev, where the access and the right to demonstrate have been restricted.
The authorities regularly report that informers and supporters of Russia have been arrested.
