A Sriwijaya Airplane with 62 people on board lost contact after taking off from Indonesia’s capital Jakarta on a domestic flight on Saturday and rescuers said suspected debris had been found in the sea off the city.

The Boeing 737-500, en route to Pontianak in West Kalimantan, disappeared from radar screens after taking off just after 2.30 p.m. (0730 GMT).

Indonesian Transport Minister Budi Karya told a news conference that 62 people had been aboard, including 12 crew. Another official had said earlier there were 56 passengers and six crew.

A member of the rescue team looking for an Indonesian plane that lost contact after taking off from the capital Jakarta holds suspected debris, at sea, January 9, 2021, in this picture obtained from social media. INSTAGRAM @HUMASJAKFIRE/via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. MANDATORY CREDIT. NO RESALES. NO ARCHIVES.

Bagus Puruhito, head of the country’s search and rescue agency Basarnas, said teams had been dispatched to search the waters north of Jakarta. No radio beacon signal had been detected, the agency said.

Agus Haryono, another official with the agency, told Reuters that debris suspected to be from the plane had been found in the sea, but it had not been confirmed that it came from the missing flight.

Reliable tracking service Flightradar24 said on its Twitter feed that Flight SJ182 “lost more than 10,000 feet of altitude in less than one minute, about 4 minutes after departure from Jakarta”.

Sriwijaya Air, an Indonesian airline, said in a statement it was gathering more detailed information regarding the flight before it could make a fuller statement.

The nearly 27-year-old Boeing 737-500 was much older than Boeing’s problem-plagued 737 MAX model, one of which crashed off Jakarta in late 2018, killing all 189 people aboard the Lion Air flight. Older 737 models are widely flown and do not have the system implicated in the MAX safety crisis.

A Boeing spokeswoman said, “We are aware of media reports from Jakarta, and are closely monitoring the situation. We are working to gather more information”.

“We found some cables, a piece of jeans, and pieces of metal on the water,” Zulkifli, a security official, told CNNIndonesia.com.

Nurhasan, a fisherman in the area known as Thousand Islands, told local media that he and his crew had found several pieces of metal.

It was raining at Soekarno-Hatta International Airport when the plane took off for Pontianak, around 740 km (460 miles) away.