Indonesian authorities on Sunday located the black boxes of the Sriwijaya Air jet that crashed into the sea soon after taking off from the capital Jakarta, as human body parts and suspected pieces of the plane were retrieved.

The Boeing 737-500 with 62 passengers and crew was headed to Pontianak in West Kalimantan on Saturday before it disappeared from radar screens four minutes after takeoff.

Indonesia National Transport Safety Committee chief Soerjanto Tjahjono said the locations of Flight SJ 182’s two black boxes had been identified.

“Hopefully, we can retrieve them soon,” said military chief Hadi Tjahjanto, without giving an estimated timeframe.

Pieces of wreckage were brought to Jakarta port by rescuers, including the plane’s altimeter radar, emergency chute and a piece that was suspected to have come off of the bottom part of the plane’s tail, KNKT official Nurcahyo Utomo said.

One twisted piece of metal was painted in Sriwijaya Air’s blue and red colours. Indonesian authorities said they had also retrieved body parts and clothing.

Police asked families to provide information such as dental records and DNA samples to help identify bodies.

The plane had 12 crew and 50 passengers on board, all Indonesians and including seven children and three babies.

Tracking service Flightradar24 said the aircraft took off at 2.36pm local timeand climbed to reach 10,900 feet within four minutes. It then began a steep descent and stopped transmitting data 21 seconds later.