An 18-year-old man has been arrested over the murder of former Ukrainian MP Irina Farion, Volodymyr Zelenskyy has said.
An unidentified man opened fire on the 60-year-old in the street in the city of Lviv last week, before fleeing the scene.
"An 18-year-old boy has been detained," the president said of the case.
"The necessary investigative actions and examinations are underway [and] I have instructed the minister of internal affairs to provide all the details to the public."
Ms Farion was famed for her work to ensure the Ukrainian language was used in Ukraine, rather than Russian
