The head of state has on Thursday met Chief of the Security Service of Ukraine (SBU) Valery Khoroshkovsky, Prosecutor General Oleksandr Medvedko, and Interior Minister Anatoliy Mohiliov in Crimea. The president demanded a response about the motives of the criminals. Interior Minister Mohiliov said that the ministry's best investigators have been sent to the accident site. He added that the ministry will take all efforts to solve the case. In turn, SBU chief Khoroshkovsky called the Zaporizhzhia case unordinary. He urged to join efforts of the Security Service of Ukraine, the Prosecutor General's Office (PGO) and the Interior Ministry to clear the case as soon as possible. Khoroshkovsky said that for the moment all versions are being studied, as well as events that could forego the crime. Prosecutor General Medvedko expressed confidence that this crime will be solved within a week. Criminal case has been instituted on the fact of willful homicide, attempted homicide, intentional damage to property. Interior Ministry spokesman Dmytro Andreyev had earlier said police was considering "absolutely all the versions" of the tragedy in Zaporizhzhia, including a possible terror attack with the aim of intimidation. As reported, an improvised explosive device (30-400grm TNT) had been detonated in the Zaporizhzhia orthodox church on Wednesday. The explosion injured nine people, and one woman later died of her injuries in hospital.