US and Indonesian authorities last week searched the Cayman Island-registered Equanimity, reportedly worth some $250 million, which was moored off the Indonesian tourist island of Bali.
"(The handing over) is in the process of being done," national police senior detective Daniel Silitonga told AFP.
The US Justice Department alleges in civil lawsuits that $4.5 billion was stolen from 1MDB -- set up by Prime Minister Najib Razak -- in a campaign of fraud and money-laundering. Najib and the fund deny any wrongdoing.
Those assets include the 300-foot (90-metre) yacht which US officials said was purchased by Malaysian financier known as Jho Low, an unofficial adviser to 1MDB.
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The ship's captain and about three dozen crew had been questioned but no one has been arrested so far, Silitonga said.
"Regarding the crew, we are still discussing it," he said, when asked if they would be taken into the FBI's custody.
Built in 2013, the Netherlands-made yacht has nine bedrooms, including a master suite with a hot tub, a helipad, a gym and spa, and a movie theatre, according to yachtcharterfleet.com.
He has denied any wrongdoing and his current whereabouts are unknown.
After the boat seizure, a spokesman for Low noted that the US Department of Justice (DoJ) had officially delayed its efforts to seize assets last year.
A US court reportedly granted a stay after a request from authorities, as they believed the civil proceedings could affect a criminal probe they are also conducting.
Low's spokesman said last week that the DoJ had "still not taken any steps to prove that any impropriety has occurred".
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