Ukraine announced on Friday that Russian airline companies, including Aeroflot and Transaero, have been banned from flying into the country starting October 25.
Prime Minister, Arseny Yatseniuk said "In accordance with a decision by the Security Council, the government of Ukraine is adopting a decision to ban flights by Russian companies, primarily Aeroflot and Transaero, to Ukraine."
He added that Russian airlines carrying military equipment have also been banned from flying into Ukraine.
Ukraine blames Russia of deploying troops to back pro-Moscow separatists clashing with its soldiers.
Approximately 8,000 people have been killed since April 2014.
Aeroflot Airlines said it did not receive an official notification about the decision from Ukraine.
"Only when and if Aeroflot receives official notification from the aviation authorities of Ukraine that flights have been canceled will the company inform passengers and explain the rules on ticket reimbursement," the airline said in a statement.
On the other hand, Ukraine also banned Ukrainian state companies from using Moscow-based anti virus program Kaspersky Lab, the largest privately-owned cybersecurity company, however, a spokesman for the company said they will continue to protect Ukrainian users despite Kiev sanctions.
“Kaspersky Lab will continue its operations in the Ukrainian market in full compliance with Ukrainian laws, providing protection to commercial organizations and individual users,” Kseniya Volnova, the company’s head of Corporate PR said.
President of Ukraine, Petro Poroshenko ordered sanctions on individuals and companies that support rebels in eastern Ukraine on Wednesday.
A ceasefire has been in effect for the last two weeks in eastern Ukraine.
Kiev and the West blame the Russian Federation of arming the separatists and sending troops into eastern Ukraine.
Russia denies the allegations, saying that Russian "volunteers" fight alongside the rebels.
Moreover, the West imposed sanctions against Russian officials and top allies of Russian President Vladimir Putin.