MUMBAI, Oct. 8 -- Two 20-year-old college students were found dead on the ground floor of an under-construction, 18-storey building in Bolinj, Virar West, late on Monday night. While the police said the men appeared to have died by suicide, their parents alleged they were killed. Suhas Bavche, deputy commissioner of police, Arnala, said the security guard at the construction site heard a loud thud from the other side of the building around 10.30pm on Monday, after all the workers had left. Upon inspection, he found the two men lying in a pool of blood on the front side of the building. "The security guard immediately called the police, and a team reached the spot within four minutes," said Bavche. "The team faced difficulties in identifying the deceased as they did not have mobile phones or any other documents. They were identified based on the number plate of a two-wheeler they used to arrive at the spot." The bodies were sent for autopsy to a civic hospital, but later shifted to JJ Hospital for post-mortem. Both deceased were later identified as residents of Achhole and final-year college students. The police did not find any note left behind by the deceased or recover their mobile phones, making their deaths seem mysterious. The police have registered an accidental death report in connection with the incident. "The reasons why they died by suicide are not yet clear. We are recording statements of their classmates and friends to find out whether they were facing any problems," said senior police inspector Vijay Patil of the Arnala Sagari police station. The family members of the deceased, however, refused to believe that it was a case of suicide. "These are not suicides, but murders," alleged the father of one of them. On Monday afternoon, his son brought his friend, the other deceased, to their house, the father said. They had tea and left around 3.30pm, saying they were going to visit Vrindavan Udyan with a third friend. But when his son did not return home after two hours, the father began searching for them. The parents approached the police and filed a missing persons' complaint. Around 11pm, the police asked the family to come to the civic hospital. "We were told that my son had met with an accident," he said. He added it was not likely for two young men to die by suicide like this. "It must be murder." The police, on the other hand, said they found nobody else at the spot. "We are now checking the CCTV footage installed by the builder at the site," said Patil. The police are presently questioning one of the friends of the deceased, who allegedly went out with the two, but he claims that he had not been in touch with the deceased for over a month....