A man in his 40s dies following a two-car collision in County Limerick, according to reports from Irish media. The crash occurs overnight, with emergency services responding to the scene. Reports state that the man is killed in the incident, while a total of four other people are injured. RTE says two people are seriously injured, indicating the severity of the collision. Other reporting also describes the outcome as one fatality and four injured, aligning with the overall casualty figures. The incidents involve two vehicles, and authorities treat it as a road traffic crash under investigation. At the time of reporting, details on the exact location, circumstances leading to the collision, and whether any charges or arrests are made are not provided in the available summaries. The injured are taken for medical treatment, with the serious injuries noted in one account.