Calcutta, April 22 :    Calcutta, April 22:  A dentist was murdered this afternoon as he was closing his chamber on Sundari Mohan Avenue near Park Circus. Surya Chakraborty, 42, had locked his ground-floor chamber around 4.30 pm and was handing the keys to his assistant, 15-year-old Chitta, when two armed youths entered the premises. They pushed the boy out of the way and hit Chakraborty on his head with iron rods. As the doctor slumped in a heap, they slit his throat. From behind a pillar, the stunned boy watched the men leave as quietly as they had entered. Chitta then ran up the stairs to the fourth floor, where the Chakrabortys lived, and informed Gopa, the doctor's wife. She is also a dentist. Gopa hurried down to find Chakraborty's body lying in a pool of blood. He was taken to Calcutta National Medical College and Hospital, where doctors declared him dead. Adding a twist to the case, Chakraborty's brother-in-law R.K. Bhattacharya said: 'Surya and Gopa had received a few threat calls last week, warning them of dire consequences if they did not vacate the house.'' Chakraborty attended two chambers, the one on Sundari Mohan Avenue and another at Rajabazar, near his in-laws' residence. The chambers were usually closed on Sundays. But he had given appointments to a few patients and so made an exception today, Gopa said. The incident has shocked the neighbourhood and the medical fraternity. Residents expressed their anguish to senior police officers when they reached the house for investigations. Chakraborty's colleagues recalled that the 1982-batch dentist was a man full of life. 'He was a sober, polite and amiable man. I have never heard or seen him raise his voice or be angry with anybody. I can't believe this,'' said S.P. Sinha, a senior dentist of Dr R. Ahmed Dental College. 'This is shocking. We can never imagine that a doctor could be murdered in so ghastly a way,'' said Madhumita Majumdar, Chakraborty's batchmate at dental college. Condemning the incident, Sudarshan Ghosh Dastidar, a senior doctor, said it reflects on the deteriorating law and order in the city. 'We are scared. How will we attend our chambers?' he asked. CPM state secretary Anil Biswas visited Chakraborty's house and spoke to Gopa and the victim's father, Krishnapada Chakraborty. Biswas said: 'Krishnapada is a member of our party. But there is no politics in this murder.' Trinamul Congress leader Sultan Ahmed, who also went to the spot, said it was a planned murder.