"If there are no explanations the Russian side will view these actions as illegal and will retain the right to apply the same measures to UK airline companies," the ministry's press service said.
According to the ministry, it will submit a request to the UK, demanding explanations over the search of an Aeroflot plane that occurred the day before.
"This department within the Federal Authority for transport oversight will submit a request to our colleagues in the UK over the reasons of the search of an Aeroflot plane that occurred on Marc 30, 2018," the Russian Transport Ministry said Saturday.
At the same time, commenting on the situation, UK Minister of State for Security Ben Wallace said that this was a routine search conducted within the standard procedures against arms and drug trafficking.
"It is routine for Border Force to search aircraft to protect the UK from organised crime and from those who attempt to bring harmful substances like drugs or firearms into the country," Wallace said in a statement obtained by Sputnik.