The 17-year-old's mum has joked that he is "grounded for life" and "never leaving the house again".

The news comes at a turbulent time for President Prabowo, who faces a growing rift with his predecessor Joko Widodo.

Activists wanted the historic liner to be turned into a museum, but it will instead become the world's largest artificial ocean reef.

Leonardo Bertulazzi, a former member of the Marxist guerrilla group the Red Brigades, was about to be extradited to his home country of Italy.

More than 6,000 Italian schools received a threat. Authorities in all three countries say there appears to be no risk to the public.

Officials say the child was found close to his father's home on Tuesday, a day after he was taken, and is being cared for in hospital.