A devastating night on Queensland roads has left three people dead and several others seriously injured after two separate crashes across the state.

Emergency services responded to multiple serious incidents, with police urging motorists to take care on Queensland roads and appealing for witnesses to provide information.

The first fatal crash occurred on the Sunshine Coast at Warana, where a pedestrian and motorcycle rider died after a collision on Nicklin Way.

Police said a 68-year-old woman was crossing the road at around 8pm on Saturday when she was struck by a southbound motorcycle. Despite emergency services attending the scene, both the woman and the 30-year-old male rider died from their injuries.

The crash caused significant disruption in the area, with emergency crews closing sections of the road while investigators examined the scene. The Queensland Police Forensic Crash Unit is investigating the circumstances surrounding the collision, including factors that may have contributed to the crash.

In a separate incident later that night, a man in his 30s died following a two-vehicle crash in Underwood, Logan.

Police said the crash happened at about 10:42pm at the intersection of Kingston Road and Parramatta Road. A southbound vehicle collided with another car, causing serious injuries to multiple occupants.

A male passenger in one of the vehicles died at the scene. Two other people were taken to hospital, including a woman who suffered critical injuries and another male passenger who was reported to be in a stable condition. The driver of the other vehicle was not injured.

Police have appealed to anyone who witnessed either crash or has dashcam footage from the areas to come forward. Investigators are working to establish the exact causes of the crashes.

The deaths have renewed concerns about road safety across Queensland, where authorities continue campaigns encouraging safer driving behaviour, reduced speed, avoiding distraction and responsible road use.

Road crashes involving pedestrians and motorcycles can have severe consequences because riders and pedestrians have limited protection compared with people travelling inside vehicles. Safety experts regularly encourage drivers to remain alert, particularly at night and around intersections, crossings and busy roads.

The Queensland community has been left mourning after the tragic events, with emergency workers, police officers and first responders again dealing with the impact of fatal road incidents.

Authorities say investigations into both crashes remain ongoing, and further information may be released as inquiries continue.

The incidents serve as another reminder of the importance of road awareness and caution for all Queensland road users.