A FlyDubai flight from Dubai to Tel Aviv made an emergency landing in Saudi Arabia on September 30 after violence in the cockpit. Here is what we know so far.

What happened: One pilot stabbed another pilot and appeared to try to bring the aircraft down. Passengers and crew overpowered the attacker, and the plane landed safely in Tabuk, Saudi Arabia.

The response: Israel scrambled fighter jets amid fears of a hijacking after the flight squawked emergency codes and dropped about 17,000 feet. The suspected attacker was arrested.

What is unclear: The attacker's nationality is unconfirmed, with conflicting reports. Israeli officials have not ruled out a terror angle, but no motive has been publicly established.

What next: Aviation and security agencies in multiple countries are investigating. The incident raises fresh questions about cockpit security and crew vetting on international flights.

Airlines around the world are watching the investigation closely. Any new safety rules that emerge from the probe could affect cockpit procedures across the industry.