Melbourne police are investigating two unrelated assaults targeting drivers in the city. Both incidents involved attacks on individuals while they were operating vehicles. Authorities are currently searching for four male suspects believed to be connected to the assaults. Details surrounding the nature of the assaults and the extent of any injuries sustained by the victims have not been released. Police are appealing to the public for information that may aid in identifying and locating the individuals. The investigations are ongoing, and further updates will be provided as they become available. Investigators have not indicated whether the assaults are linked in any way.