A mob of 150 people attacked a car in a McDonald's drive through after the annual It's Your Festival in Hamilton's Gage Park Saturday night, police say.

Just before midnight on Saturday, a man and a woman stopped at the McDonalds drive thru at Main and King. As they were leaving, a large group of around 150 young people started to throw food at them and kick their car, police say.

The driver got out of the car and started to film what was happening when a male youth walked over and assaulted the driver. The female passenger then got out and was also assaulted, police say. Const. Claus Wagner of Hamilton police told CBC Hamilton that they both needed medical treatment, but weren't seriously injured.

No charges have been laid, Wagner said.

"We're just piecing everything together through video now."