Umno Youth has filed a police report against Youth and Sports Minister Syed Saddiq Syed Abdul Rahman and has threatened a lawsuit if the latter does not apologise to the party.

This is after Syed Saddiq claimed that the mob which surrounded and heckled him in Ulu Tiram, Johor last night, was believed to have been from Umno.

Umno Youth chief Asyraf Wajdi Dusuki (photo) wants police to probe the minister for slander, as well as under the Communications and Multimedia Act for spreading objectionable information.

He said they will be sending a letter of demand to Syed Saddiq soon to demand a public apology.

"If he fails to do so, Umno Youth will file a defamation suit in court," he said in a statement this evening.

Syed Saddiq and his family attended a gathering at a restaurant at Ulu Tiram last night, together with members from the Bersatu Youth, women and division wings as well as their families.

He said a group of about 200 people allegedly gatecrashed the function, surrounded him and began heckling and shouting.

In a Facebook posting this morning, he claimed the mob was believed to be from Umno.

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

Syed Saddiq further claimed he, his family, the two assemblypersons and others had to “jump the fence” to get away.

Asyraf has denied Umno's involvement in the incident.

Meanwhile in a separate statement, Home Minister Muhyiddin Yassin, - who is also Bersatu president - said he has ordered the police to investigate the incident.