Russia has promised to hunt down those responsible for the downing of the jet that killed 224 people and intensify its air strikes on Islamist militants in Syria in response.
A suicide bomber rammed a car laden with explosives into a police club in the provincial capital of Al Arish, destroying the facade and several nearby cars while killing at least six people.
It is the first day of Egypt's presidential elections and a big victory is expected for former Field Marshal Abdel Fattah el-Sisi,
Abdul-Fattah el-Sisi has promised to wipe out the Muslim Brotherhood if elected later in May. This may cause more, not less, instability.