WHAT HAPPENED?

The aircraft took off at 2:36 pm local time and climbed to reach 3,300 metres (10,900ft) within four minutes.
It then began a steep descent and stopped transmitting data 21 seconds later.
According to the head of national search and rescue agency Air Marshal Bagus Puruhito, no distress signal was received from the aircraft.
The aircraft is believed to have dropped more than 3,000m (10,000ft) in less than a minute.
Witnesses said they saw and heard at least one explosion.
Authorities said signals from the boxes containing the cockpit voice and flight data recorders were detected between Lancang and Laki islands in the Thousand Island chain just north of Jakarta's coast.
The search and rescue operations are still ongoing, which includes dozens of helicopters, 53 navy ships and 20 boats and 2,600 rescue personnel. Parts of the plane have been found in the water at a depth of 23 meters.
Twenty-six bags, containing remains of victims, pieces of clothing and aircraft debris were located and handed over to the Jakarta-based disaster victim investigation unit for identification.

Family members of a passenger of Sriwijaya Air's flight SJ182, which crashed into the sea off the Jakarta coast, react, in Denpasar, Bali Province, Indonesia, January 10, 2021, in this photo taken by Antara Foto/Fikri Yusuf/via Reuters