SINGAPORE - A teen who was accused of abetting the rooftop vandalism of a Toa Payoh Housing Board block was ordered to undergo 15 months' probation on Monday.

David William Graaskov, 18, had pleaded guilty to three of six charges - theft of four spray cans as well as criminal trespass at Marina Bay Suites and a construction site in Balestier.

Four of his alleged accomplices - Boaz Koh Wen Jie, Reagan Tan Chang Zhi, Chay Nam Shen and Goh Rong Liang, all 18, will appear in court on Wednesday for their cases to be mentioned.

A Community Court heard that after Graaskov and the rest had stolen the spray cans worth $12 from a parked lorry in Lorong 5 Toa Payoh on May 6 last year, the group agreed to spray the rooftop of Block 85A at Lorong 4.

The graffiti was splashed across a large flat wall panel on the top of the block, and included expletives directed against a local political party.

Graaskov did not take part in the spraying as he left the group to catch the last bus home.

Investigation showed that Graaskov was also involved in trespassing into the Marina Bay Suites condominium on March 29 last year as well as the construction site in Jalan Rajah sometime between October and December 2013.

District Judge Lim Keng Yeow also ordered Graaskov to stay indoors from 10pm to 6am during his probation period and do 80 hours of community service.

His parents, who were in court, were each bonded for $5,000 to ensure his good behaviour.

The maximum penalty for theft is three years and a fine. For criminal trespass, the maximum penalty is three months' jail and a $1,500 fine on each charge.