Hardcore porn was broadcast on the Indonesian parliament's internal information service today, shocking journalists and bureaucrats who rely on the screens for updates on political events.

Hardcore images apparently taken from the Internet filled the screens used by reporters, political staffers and visitors for about 15 minutes before security guards managed to shut it off, reporters said.

It was not clear how the images appeared on the screens but House Speaker Marzuki Alie said whoever was responsible would be punished.

"Whoever hacked the screens is insolent and will be reported to the authorities," he told reporters.

The incident is sure to embarrass President Susilo Bambang Yudhoyono, who has recently backed calls for stricter controls on the Internet following a national scandal over an online celebrity sex clip.