Russia has ordered the suspension of all flights to Egypt following indications that the crash near Sharm el-Sheikh was caused by a bomb.
President Vladimir Putin made the announcement after UK investigators said they believed a bomb was put in the plane’s hold prior to take-off.
The UK has suspended flights to Sharm el-Sheikh has arranged for Britons to return home.
Militants linked to the Islamic State group say they downed the plane.
The Metrojet Airbus A321 was flying from Sharm el-Sheikh to St Petersburg when it went down in Sinai on Saturday, killing all 224 people on board. Most of the victims were Russian.