One of the crew, and one of the passengers appears on a NRK talk show at the moment.
Pilot says the attack commenced when the aircraft was on final, at aprox 4000ft.
They plunged to 100ft due to the Algerian pushing the controll collum forward.
Nose up pitch was gained with other means (perhaps trim/????) during recovery from the dive.
After the battle between the attacker and passengers, the collum was released, which resulted in violent nose up movement, with a climb to 1200ft, where the aircraft stalled, and nosed down again. The aircraft was subsequently recovered, and landed safely.
Both pilots lost their headsets, and was not able to establish contact with ATC during/after the incident.