Ukraine's Prosecutor General Yuriy Lutsenko has proposed to promptly enhance security during mass events in Kyiv.

"I don't think that we have to prohibit something but mass events of any kind should be held in the short term with the use of metal detection arches. We receive too much information about provocations that can possibly happen within the next few days, and given today's horrific incident with Pavel [Sheremet, who was blown up in the car he drove], this may be part of some kind of an actually big plan," the Ukrainian presidential press service quoted Lutsenko as saying on Wednesday.