The district crime branch has taken over the investigation into the killing of a young doctor here recently by a patient she was attending to, police said on Friday. Dr Vandana Das, a house surgeon at Azeezia Medical College Hospital was working at the Kottarakkara taluk hospital as part of her training. She was stabbed to death by a man brought there by the police in the wee hours of Wednesday.

"The District Crime Branch will probe the matter now," a senior district police official told PTI.