A man has been left bruised and his siblings shaken after a gang broke into their home and robbed them.

Nick Budden, brother Josh and sister Chloe were at their home in Thornlands, in Brisbane's east-south-east, when the gang stormed their home Wednesday night.

"They just came at me and I was absolutely terrified, I didn't know what to do," Nick said.

"They terrorised my sister, I came downstairs, they came for me," Josh added.

"They terrorised my sister, I came downstairs, they came for me." (9NEWS)

"The whole time they were yelling, where are your valuables, where are your car keys."

Mr Budden and his brother attempted to fight back but were outnumbered.

The gang – compared by police to a "pack of wild dogs" – managed to escape with a number of the family's valuables, including Josh's car.

It's believed the gang could have also been involved in the sexual assault and robbery of a woman in a Sunnybank carpark, also on Wednesday.

The gang – compared by police to a "pack of wild dogs" – managed to escape with a number of the family's valuables, including Josh's car. (9NEWS)

Police fear the group may have been high on a dangerous stimulant known as khat, which originates in Africa.

Two men have been arrested over the Sunnybank attack, while those who terrorised the Buddens remain on the run.