File photo shows Russian military investigators near the debris of a Russian airliner at the site of its crash at the Hassana area in Arish city, north Egypt.

Egypt said on Monday it had found no evidence so far of terrorism or other illegal action linked to the crash of a Russian passenger plane in Sinai that killed all 224 people on board on Oct. 31.

Russia and Western governments have said the Airbus A321 operated by Metrojet was likely brought down by a bomb, and ISIS said it had smuggled an explosive on board.

But Egypt’s civil aviation ministry said it had completed a preliminary report on the crash and said it had so far found no evidence of a criminal act.

“The technical investigative committee has so far not found anything indicating any illegal intervention or terrorist action,” the ministry said in a statement.

The crash hit Egypt’s tourism industry, a cornerstone of the economy. The plane took off from Sharm al-Sheikh, a Red Sea resort popular with Russian and British holiday makers.

It raised serious questions about airport security with Russia and Britain both suspending flights into Sharm al-Sheikh.

Egypt is facing a two-year Islamist insurgency in the Sinai that killed hundreds of soldiers and police. ISIS said the bombing was in response to Russian air strikes in Syria.

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