The Egyptian navy has said it has found belongings and parts of the missing EgyptAir's fuselage about 180 miles north of the Egyptian city of Alexandria.

A statement from the Egyptian army released on Friday morning said that planes and naval teams participating in the search operation for the EgyptAir plane that disappeared midflight on Thursday had "managed to find some passengers belongings and other parts of the plane north of Alexandria" and were continuing to search and retrieve what they could.

The search for wreckage from missing EgyptAir Flight MS804 that disappeared en route from Paris to Cairo on Thursday entered a second day Friday.

When asked if the military was sure that the wreckage was from Flight MS804, Egyptian Ministry of Defense spokesman Brig. Gen. Mohamed Samir told NBC News: "Yes, of course ... we are the military."

Earlier Friday morning, EgyptAir had wound back claims that wreckage found near the Greek island of Karpathos was from missing Flight MS804, as Egyptian authorities said it was possible a terror attack had brought down the passenger jet.

The plane was believed to have crashed into the Mediterranean Sea with 66 people on board. It disappeared from radar while over the Mediterranean, about 10 miles into the Egyptian air zone. The causes of the crash are still unknown.

Greek and Egyptian investigation teams are trying to find wreckage of the missing plane and are being aided by French, Turkish and U.S. military support.

Earlier, authorities said in a statement that wreckage was found near Karpathos Island, and EgyptAir had tweeted that the Egyptian Ministry of Foreign Affairs declared that the debris was from MS804. But the Egyptian flagship carrier's Vice President Ahmed Adel later told CNN that the company had been misinformed and the wreckage was "not part of our plane."

"The search and rescue is still going on," Adel said.

Meanwhile, Reuters cited Egyptian Prime Minister Sherif Ismail as saying that it was too early to rule out any explanation for the crash, including the possibility of an attack like the one blamed for bringing down a Russian Metrojet holiday airliner in Egypt's Sinai region in October.

And NBC News reported that, when pressed by reporters for his thoughts, Egyptian Civil Aviation Minister Sherif Fathy said the possibility of a terrorist attack was stronger than that of a technical failure.