A woman and man have died after a collision between a motorbike and pedestrian on the Sunshine Coast.

The 68-year-old woman was walking across Nicklin Way in Warana when she was hit by a motorbike at around 8pm on Saturday.

Police said the woman and the 30-year-old male rider died at the scene.

In a separate crash in Logan around 10:42pm a man was killed and two others seriously injured.

Police said a car travelling south on Kingston Road collided with another car at the Parramatta Road intersection in Underwood.

A male passenger in the second car, aged in his 30s, died at the scene.

The female driver was taken to hospital where she remains in a critical condition while another male passenger is in a stable condition.

The driver of the other car was uninjured.

Police are appealing to the public to come forward with information and any relevant video footage.