christina de jesus tried to help a young girl who was knocked unconscious. >> so when she finally came to, i'm just like, don't move, don't move, when i turn back, i'm yelling at everyone, call 911. >> reporter: a huge number of officers combed the scene, and someone's front lawn with neighbors who saw the carnage praying for the victims and praying that what they saw was not real. and investigators right now are looking at whether a medical problem may have caused the crash. new at 6:00, officials say an airliner that crashed in egypt broke apart midair shortly after take-off. 224 russian tourists were on board the plane yesterday morning. everyone on board was killed. now investigators are trying to figure out exactly what caused the crash. it was headed to russia from egypt. a man who lost his wife spoke out after he heard the news. >> my wife, where are you from? >> st. petersburg. >> was she on vacation there? >> yes, she went with the children and with the grandfather. the grandfather and the children returned earlier, and she stayed later. >> reporter: police still trying to ide