France's aviation accident investigation bureau has confirmed that EgyptAir Flight MS804 sent signals reporting that smoke was detected on the jet before it plunged into the Mediterranean Sea on Thursday, according to Reuters.
According to the brief report, the Bureau d'Enquetes et d'Analyses (BEA) said that the signals did not explain what caused the smoke, and that the priority now was to find the plane's flight recorders.
The Aviation Herald, which reports on aviation news, reported on Friday that it had received information from "three independent channels" that the plane's communications system had sent messages saying that there was smoke in a lavatory and in "avionics" and that there were faults in the "FCU" and "SEC 3."
The New York Times reported that the avionics bay is where much of a plane's electronic equipment is housed.
The FCU, or flight control unit, refers to a control panel used by the pilot to control settings such as speed and altitude. According to a report by NBC News' Tom Costello, the SEC 3 is a computer that controls the plane's spoilers and elevator computers.
The automated messages were sent by the Airbus A320's Aircraft Communications Addressing and Reporting System (ACARS), the Aviation Herald reported.
Flight MS804 disappeared from radar over the Mediterranean Sea in the early hours of Thursday while en route from Paris to Cairo. It was carrying 66 people: 56 passengers, including a child and two infants, as well as three of the airline's security staff and seven crew members.
On Friday Egypt found debris from the missing plane. In a tweet on Friday early evening local time, EgyptAir said that the Egyptian Military and Marine Forces had "discovered more debris," adding that the wreckage found included passengers' body parts, belongings and luggage and aircraft seats.
"Search is still in progress," the Egyptian flagship carrier tweeted.