Rescue workers save more than 150 but some 400 migrants still missing.
Ansari orchestrated October attack on Russian plane that killed 224 people.
Amnesty report accuses security agencies of abductions and torture.
The official holiday, called “June 30 Revolution,” was marked by a lavish military display in the capital Cairo.
French authorities launched an 'accident' probe on Monday.
Search zone for devices narrowed down in Mediterranean Sea.
Egyptian official's claim contradicts Greek defense minister's account.
Wreckage found in the Mediterranean Sea, 290 km from Alexandria.
An EgyptAir plane with 66 passengers and crew on board went missing on Thursday on its way to Cairo from Paris. The plane's wreckage was found near the Greek island of Karpathos.
The interior ministry, which denied the raid, admitted that the arrests were made by its officials.
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