Singaporean billionaire cooperating in anti-graft probe involving transport minister

Singapore's anti-graft agency issued an arrest notice for billionaire Ong Beng Seng related to an investigation involving transport minister S Iswaran.
Ong, whose company owns the rights to the Singapore Grand Prix, has been asked to provide information on his interactions with Iswaran and is fully cooperating.
No charges have been filed against Ong, and Iswaran has taken a leave of absence pending the investigation.
Ong has a net worth of $1.75 billion and is credited with bringing Formula One racing to Singapore in 2008.
The probe is rare for Singapore's government, which is known for being corruption-free.