"The seizure was done at the initiative of the DOJ, which asserted ownership of the yacht on behalf of Malaysia and 1MDB (1Malaysia Development Bhd) because monies belonging to us were used to purchase it", he said. "Accordingly, the Equanimity is properly seized under the laws of Malaysia", Thomas said in a statement this afternoon.
Hishammuddin Hussein, Malaysia's former defense minister, had said the center was crucial to curb the spread of "violent extremism" by armed groups, including the Daesh Takfiri terrorist group.
In November previous year, then Defence Minister Datuk Seri Hishammuddin Hussein defended the setting up of the KSCIP in Putrajaya, against its detractors who were concerned that Malaysia might have painted a bull's-eye on itself for the Islamic State (IS) terror group.
The Malaysian authorities have revoked his passport and issued an arrest warrant although he has previously denied any wrongdoing.
Mahathir said any claimants to the yacht should provide proof that it belonged to them, and where they got the money to pay for it.
The Equanimity today docked at the Boustead Cruise Centre Terminal in Port Klang at 12.40pm, brought here by Indonesian police under heavy escort by local marine police teams from Johor and Port Klang.More news: Ruby Rose Is The CW's Batwoman
He was in the building for about 45 minutes after which his motorcade was seen leaving the premises.
Mahathir ousted his predecessor and former protege Najib Razak in an election in May, and immediately launched an investigation into 1MDB.
"At the end of the day, the yacht must be sold off" so that Malaysia can recover as much money as possible from it, Lim said.
The US Department of Justice has said more than $4bn was misappropriated by high-level officials from the fund and their associates.
Finance Minister Lim Guan Eng told reporters the government planned to take inventory of items one the yacht and open the vessel for public viewing, before eventually selling it "at the highest price".
A luxury yacht allegedly bought with money stolen from the multibillion-dollar looting of a state investment fund arrived Tuesday at a Malaysian port.