India, July 5 -- Three air-conditioner (AC) mechanics were found dead and another unconscious in their rented apartment in Dakshinpuri near south Delhi's Ambedkar Nagar, police said. The unconscious man is undergoing treatment at a government hospital.

Police have ruled out foul play and suspect suffocation as the cause of death. "However, what led to the suffocation is also not clear," a senior police officer said.

All four were AC mechanics by profession and aged between 20 and 25, the officer added.

According to police, Zishan, a resident of Bhalswa Dairy in outer Delhi, alerted the police control room after his relative Imran, also known as Salman, had stopped responding to his calls, deputy commissioner of police (south) Ankit Cha...