Saw one report that the Thursday debris was not from an aircraft.
CAIRO — Egyptian naval vessels, part of an international search-and-rescue flotilla, discovered debris and personal belongings on Friday from an EgyptAir plane that went down with at least 66 people on board, raising fears of a terrorist attack, Egypt’s military said.
The items, including human remains, two seats and one or more suitcases, as well as pieces of the plane, were recovered in the Mediterranean Sea about 180 miles north of Alexandria, Egypt, the Greek defense minister and an Egyptian military spokesman said.
http://www.nytimes.com/2016/05/21/world/middleeast/egyptair-flight-ms804.html?_r=0
from a suicide belt or exploding underwear maybe?