President Vladimir Putin’s chief of staff says that a Russian ban on all flights to Egypt in the wake of a Russian plane crash will last for at least several months.

Sergei Ivanov said on a visit to Finland Tuesday that it would be impossible to radically revise the nation’s security system in a short time, according to Russian news reports.

Putin suspended all flights to Egypt on Friday amid security concerns after the Oct. 31 crash of a Russian airliner that killed all 224 people onboard. U.S. and British officials have cited intelligence reports indicating that the plane flying out of Sharm el-Sheikh was brought down by a bomb on board.

Ivanov said Egypt needs to revise its security regime not only in Sharm el-Sheikh, but also at other airports.

(AP)