A 44-year-old man from Malaysia, Chai Fui Chet, was charged with intentionally causing harassment to Singapore Prime Minister Lee Hsien Loong, according to The Straits Times.
He had allegedly threatened PM Lee by sending him a Facebook message on 7 November at about 1.51pm, at the Istana.
In his message, he had allegedly threatened to burn down Seagate Singapore.
Straits Times reported that Chai is currently in remand at the Institute of Mental Health (IMH) for medical examinations.
He is expected to return to court on 9 December, and if found guilty, faces a jail term of up to 6 months and/or a fine of up to $5,000.