This includes an ongoing FBI review of the hard drives retrieved from the homes of both Captain Zaharie Ahmad Shah and first officer Fariq Abdul Hamid, and a flight simulator from the pilot's home.
"They have accessed the data," the official said. "There is nothing that's jumping out and grabbing us right now."
A Malaysian government official told CNN law enforcement analyst Tom Fuentes yesterday that authorities have found nothing negative in 19 days of investigating the two pilots that has led to any motive, be it political, suicidal or extremist.
It reported that authorities have also so far found nothing suspicious in the investigations into the 10 other crew members and the 227 passengers.
The plane's disappearance 20 days ago appears to have stumped American investigators who say that there are "counterarguments to every theory right now".