Anwar Ibrahim

"No grounds were given," Leong told Reuters. "There appears to have been some note which put the official on alert to stop him from coming in and to detain him until he obtained approval from the superior."
Leong said immigration officials later gave Anwar clearance to enter, adding he would be allowed to leave soon.
In the Malaysian capital on Tuesday, dozens of policemen blocked the main entrance to the parliament building to foil an opposition-led rally demanding free and fair elections.
Riot police, armed with batons and shields and backed by a water cannon, took positions close to the parliament while vehicles passing through were checked.