Three persons, including a couple, were killed and three others critically injured when an ambulance which was carrying a patient to hospital rammed a tree and overturned at Panthallur, near Kunnamkulam, in the early hours on Wednesday.
The deceased were identified as Femina, 30, her husband, Abid, 35, and her cousin Rahmath, 48.
The accident occurred around 1.30 a.m. It is suspected that the driver of the ambulance lost control of the vehicle in heavy rain.