Businessman Delson Moo was charged in court on Friday with two counts of unauthorised modification of computer material under the Computer Misuse and Cybersecurity Act. This is in relation to the recent hacking of an Istana webpage on Nov 8.

Moo had alledgly intruded into the website twice at 12.34am that night through its search function and modified the code to cause the site to display a picture of an old woman pointing her middle finger, along with a string of offensive words in Hokkien.

The 42-year-old's bail was doubled to $20,000 after he was granted permission by the court to leave Singapore for a family holiday in Thailand next month. He also has to report to the police within 24 hours of his return. The case against him has been fixed for a pre-trial-conference on Jan 24 next year

Student Melvin Teo, the second suspect reportedly linked to the cyber intrusion of the Istana website, is expected to appear in court at the same time to face charges. The 17-year-old's name was not indicated in the charges against Moo.

Moo, who remains on $10,000 bail, arrived at the court earlier at about 9.15am. He was accompanied by a woman, believed to be his wife, and lawyer M. Ravi.

Mr Ravi is also representing James Raj Arokiasamy, whom court documents previously identified as the alleged hacker who used "The Messiah" pseudonym.

The 35-year-old accused of hacking the Ang Mo Kio Town Council website has been remanded for further investigations.

Police had said previously that the cases against Moo and Melvin are not linked to James Raj, who also faces charges of drug offences committed in 2011.