• EgyptAir Flight MS804 was flying from Paris to Cairo and vanished from radar with 66 people on board.

• The Airbus A320 crashed into the Mediterranean Sea but the cause is unclear.

• One child and two infants were among the 30 Egyptians, 15 French and 10 other nationalities on board.

• EgyptAir retracted a previous statement that wreckage was found. Earlier, Greek officials denied that debris recovered was from the plane.

EgyptAir Flight 804 plummeted into the Mediterranean Sea early Thursday while en route from Paris to Cairo with 66 people on board, and authorities were investigating whether the plane was taken down by terrorists.

Search teams scoured the sea for possible wreckage on Thursday. EgyptAir said some of the plane's wreckage was found near the Greek island of Karpathos late Thursday, but later retracted the statement to CNN . Greek officials denied that any debris recovered so far was linked to the plane.

EgyptAir Flight MS804 left Paris at 11:09 p.m. and was scheduled to land at 3:05 a.m., Cairo time. It was cruising at 37,000 feet when it vanished from radar around 2:45 a.m. Cairo time.

The cause of the crash hadn't been determined. U.S. intelligence officials told NBC News that imagery suggests there was an explosion on the plane. However, U.S. officials cited by Reuters contradicted that claim , saying the imagery being reviewed showed no signs of an explosion so far.

"At this time we do not yet know definitively what caused the disappearance of Flight 804," the White House said in a statement Thursday night.

READ MORE: What We Know So Far About EgyptAir Flight MS804