A psychiatric patient who called the police, and threatened to join the Islamic State in Iraq and Syria (ISIS) militant group and bomb Singapore, was yesterday ordered by the State Courts to undergo 24 months of mandatory treatment.

Lee Soo Liang, 37, who suffers from schizophrenia and obsessive compulsive disorder, issued the threat on Nov 15 last year because he wanted to stay at the Institute of Mental Health(IMH) or go to jail, according to court documents.

He wanted to join his mother, who resides in IMH, and former girlfriend who was admitted recently. He made the call from Simei Care Centre, where he had been residing for the past eight years.

Lee "had absolutely no intention to join ISIS or bomb Singapore", the prosecution said. He was not in touch with anybody linked to ISIS and "did not know nor have the means to make a bomb", although he was aware of ISIS. Lee was initially charged under the United Nations (Anti-terrorism Measures) Regulations for making a false threat of a terrorist act. But it was reduced to one of transmitting a false message to police by virtue of his "lengthy history of psychiatric illness".

Jalelah Abu Baker