KYIV, March 22 – The Ukrainian authorities are looking for ways to respond to a violent rally in front of the Presidential Office on Saturday that left one window broken and walls covered in graffiti, an official said Monday.

A group of activists joined the rally in protest of recent court ruling against Serhiy Sternenko, an activist from Odesa. The protesters accuse the judge and the court system of corruption and believe the activist has been persecuted by pro-Russian figures in Odesa.

Anton Herashchenko, deputy interior minister, said police, which has failed to prevent the attack, has recorded the rally on video and will start looking for those involved.

"Every second of every move has been documented,” Herashchenko told ICTV. “Everyone who caused damage to state property, and this is our property, because our taxes were used to build buildings, our taxes will be used to finance the cleaning of these buildings, so everyone will get their own.”

The protest is the latest challenge to President Volodymyr Zelenskiy, whose domestic policies are viewed by the protesters as not going far enough to fight corruption. It comes as Zelenskiy has been already facing pressure from the U.S. to speed up reforms and to battle corruption.

Police has identified and detained a person allegedly responsible for breaking the window at the Presidential Office on Saturday, the authorities said. Overall property damages are estimated at UAH 2 million.

The possibility of further confrontation with the protesters, who have already plan similar rallies in the future, presents potentially dangerous escalation that may pose political challenge to Zelenskiy.

The rally, among other things, was in focus at a meeting via video link between ambassadors of G7 countries and the European Union and Andriy Yermak, the chief of staff at the Presidential Office on Monday.

"The people who came to the Bankova Street were set up to provoke a conflict,” Yermak said in a statement released by the presidential office. “What happened on Saturday is completely unacceptable for a democratic state that is at war and has won its right to freedom and independence at a very high price." (tl/ez)