"The conversation with the Czech ambassador will continue in the foreign ministry today," Zakharova told Vesti FM radio station.
"There will be a concrete conversation about what steps we will take if Prague makes relevant moves," the spokeswoman continued.
The Czech Republic can demand from Russia a financial compensation or excuses for the deadly 2014 ammunition depot blasts, Foreign Minister Jakub Kulhanek said in an interview with Lidove noviny newspaper.
"If a country commits an internationally wrongful act and, thereby, causes damage to another state, the injured state can demand compensation. This may be either restoration [of what was lost] ... or pecuniary compensation or ... acknowledgment or excuse. We discuss different option," Kulhanek said.
Czech Prime Minister Andrej Babis said on 17 April that the country's authorities suspected Russian intelligence services of involvement in an explosion at an ammunition depot in Vrbetica in 2014. The Kremlin called these accusations outrageous and unfounded.
Eighteen Russian diplomats were expelled from the Czech Republic. In response, Russia declared 20 employees of the Czech Embassy personae non gratae. They already left the country.
