Czech PM Andrej Babiš told President Miloš Zeman at a meeting Monday that there is clearly only one investigation version in the case of the Vrbětice explosion, a version involving Russian GRU agents, Babiš said to the media. Zeman mentioned two investigation versions in his televised speech on Sunday. "There is only one investigation version, which is, of course, according to circumstantial evidence and what we received from the police, an attack by Russian agents," Babiš said. A diplomatic rift between Prague and Moscow flared up on Saturday, April 17, over the Czech secret services' well-founded suspicion that the Russian GRU military secret service agents were behind the 2014 explosion in an ammunition depot in Vrbětice.