"Armed opposition groups must stop all illegal actions, including detaining people and seizing public buildings in violation of Ukraine's laws and Constitution," Pillay said.

She urged the armed opposition groups to lay down weapons, free "arbitrarily detained persons", and vacate occupied public and administrative buildings.

The UN Human Rights Chief called on the Ukraine government to ensure that military and police operations are undertaken in line with international standards.

"It is extremely important that the authorities themselves demonstrate full respect for the rule of law and scrupulously protect the human rights of all, including the Russian-speaking population," the High Commissioner noted.

She urged the authorities to carry out prompt, transparent and comprehensive investigations into the events in Odessa and Donetsk regions that led to the deaths of dozens of people in recent days.

The events included the fire in the trade union building in Odessa on Friday last week, which is believed to have killed more than 40 people.


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