Dr Mahathir's lawyer Mohamed Haniff Khatri Abdulla said the suspects disrupted the forum by throwing shoes, slippers and chairs, and lighting flares.
Pakatan Harapan chairman Dr Mahathir Mohamad was answering questions at the "Nothing to Hide 2.0" forum this afternoon when out of nowhere, two projectiles with pungent chemical odour were hurled in his direction.
Mahathir was safely escorted out of the hall.
"We haven't decided what to charge them with yet, because no one has yet to lodge a police report", he said, adding that no serious injuries were reported in the incident.
IS suspect stabs Istanbul policeman while taken into custody
The police officer was taken to hospital with heavy injuries, while the suspect was shot dead by other police officers. The suspect was taken to Istanbul police headquarters, where police say he attacked an officer with a knife.
Shah Alam district police chief Shafien Mamat says 3 suspects, aged 17 to 19, arrested as Nothing to Hide 2.0 forum ends in chaos.
"It is clear it was created to silence Mahathir and the opposition", said Syed Saddiq, the youth chief of Mahathir's recently established Bersatu party.
Opposition lawmaker Azmin Ali said: "Najib is using gangsterism to shut Mahathir's mouth".
"I have condemned what took place but wait for police to conclude investigations before you start pointing fingers", Sports Minister Khairy Jamaluddin tweeted.
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An Ohio man is facing murder charges after he plowed his auto through a crowd of protesters, killing a 32-year-old woman. One attendee says we as country need to be more active in standing against the violence happening nationwide.
The town hall meeting was aimed at highlighting a major financial scandal that has ensnared Prime Minister Najib Razak, and which has spurred Mahathir, 92, into coming out of retirement to take on his ex-protege.
Mahathir has been spearheading calls for Najib to resign over a multibillion-dollar scandal involving indebted state fund 1MDB, which is being investigated in several countries for money laundering.
Experts blame racial rhetoric that has escalated in recent months following Mahathir's move to join the opposition.
Before the violence erupted at Sunday's event, called "Nothing to Hide" and attended by some 2,000 people, Mahathir had repeated his criticisms of Najib over 1MDB.
Clues in Eastwatch Trailer You Should Pay Attention To
As Jon admired the beast, Daenerys attempted to press the King of the North on Davos's comments at their introduction. While Daenerys tried to observe (but couldn't see because Drogon is a big boy), Jon approached and petted the dragon.
In fact, Tun Mahathir has set aside his past with Anwar. But the fund has been at the center of investigations in the US and other countries amid allegations of a global embezzlement and money-laundering scheme.