Remember last week's billboard broadcast of porn in Jakarta?

It was an ordinary afternoon drive for commuters in Jakarta – before porn took over a jumbo-tron billboard for 5 minutes

Now, the man responsible for the incident has been arrested, confirming that it wasn't an accident, but a deliberate act of vandalism at a major intersection in the capital.

Police and cybercrime specialists in the largely conservative, Muslim-majority country launched a hunt for the perpetrator and on Tuesday arrested a 24-year-old IT analyst in his office.

The man has confessed to the crime in a Jakarta court. He admitted hacking into the billboard to stream porn to thousands caught in the afternoon traffic jam. Spectators were “shocked and amused" 5 minutes after a Japanese porno film 'Watch Tokyo Hot' began playing on the billboard.

The man easily hacked into the billboard after seeing log-in credentials displayed on the billboard.

“We are still investigating whether he was working alone, whether he had a particular motive or whether he was just fooling around,” Jakarta Police Chief Muhammad Iriawan, told AFP. Under the Electronic Transaction Law, he could be jailed for 12 years. Pornography is illegal in Indonesia.

Even romantic scenes in films and television programmes are often blurred or cut altogether by state censors.