Russian plane crash in Egypt killing all 224 passengers

A Russian passenger plane crashed early Saturday in Egypt's Sinai Peninsula, killing all 224 people aboard, officials said.

Russian state media reported that many of the 217 passengers on Kogalymavia Flight 9268 were Russians returning from vacation. The passenger manifest included 17 children but Russian officials said there were 25 aboard. There were seven crew members.

The plane departed the Red Sea resort of Sharm el-Sheikh, near the southern tip of the Sinai, on a flight to St. Petersburg, Russia. It vanished from radar 23 minutes into the flight, at 6:20 a.m. local time.

Islamists militants in the Sinai linked to ISIS claimed responsibility for the crash, according to an online statement.

But Russian Transport Minister Maxim Sokolov said the claim that terrorists brought down the plane by using an anti-aircraft missile "cannot be considered reliable," according to Russian state news agency RIA Novosti. 

Egypt has been battling insurgents in the Sinai aligned with the terrorist group ISIS.