The suspected leader of the Islamist militant group Jemaah Islamiah in Singapore has escaped from jail there, the authorities say.
Mas Selamat Kastari was first detained in 2003 in Indonesia
A huge manhunt is underway to find Mas Selamat Kastari, according to the home affairs ministry.
He's accused of planning attacks on official buildings and foreign targets in Singapore as well as Changi airport.
Kastari has been in detention since 2006 under Singapore's Internal Security Act.
Kastari was first arrested and imprisoned for immigration offences in Indonesia in 2003 after reportedly going on the run from the Singaporean authorities. He was extradited to Singapore three years later.
Police in Singapore accuse him of plotting to hijack and crash a plane into Changi International Airport in 2001 - a plan which was never carried out.
The American embassy in Singapore was among the buildings he's alleged to have targeted.
The home affairs ministry said in a statement: "Extensive police resources have been deployed to track him down." He was not known to be armed, said the ministry.
Police, Ghurkas and special forces are reported to be involved in the search for Kastari, who walks with a limp.
Jemaah Islamiah, which has links to al-Qaeda, is blamed for being behind the bombings on the Indonesian island of Bali in 2002, which left 200 people dead.