Feminist group Femen are claiming that three of their members have disappeared after arriving in the city of Donetsk. The group planned to hold a protest during Ukraine’s match with France on Friday.
The activists said to be missing are Alexandra Shevchenko, Yana Zhadanova and Anna Bolshakova.
Inna Shevchenko, a spokesman for the movement, reported that after arriving in the city, the activists were followed by a group of about 15 men.
Shevchenko went on to say that at 4pm local time, the missing activists lost all contact with the leadership of the association and have unsuccessfully tried to locate them since.
The organisation has held several protests against prostitution and trafficking of women in Ukraine and Poland.
The Ukrainian authorities do not recognise the organisation as a political group, which results in numerous women arrested for disorder in the streets.
Shevchenko insists that they will continue with their efforts, telling reporters: "We have reached our goals. And of course we will continue.
"Our mission is to protest any event that is related to the Euros."