Police have arrested two individuals believed to be the "masterminds" behind a mob which disrupted an event attended by Youth and Sports Minister Syed Saddiq Syed Abdul Rahman in Johor last night.

Inspector-General of Police Abdul Hamid Bador said efforts are underway to find the others involved.

Syed Saddiq - who is Bersatu youth chief - and his parents had attended a gathering at a restaurant at Ulu Tiram last night together with members from Bersatu's youth, women and division wings as well as their families.

He said a group of about 200 people allegedly then stormed the function and surrounded him and his family and began heckling and shouting.

In alleged videos of the incident circulating online, the group could be heard yelling for the Muar MP to leave the state.

Hamid said police were investigating the case for wantonly giving provocation, with intent to cause a riot, criminal force with intent to dishonour a person, criminal force in attempt wrongfully to confine a person and criminal intimidation.

The top cop urged the public not to politicise the issue or spread any baseless information on any social media platforms.