The four men, with an estimated height of 6.5 feet and speaking in Hindi or English, came to the hotel in a car with a Delhi registration number which turned out to be fake, police said.
"The four persons who fled the hotel before the police reached there could be terrorists... The four suspected terrorists had claimed to be natives of Iraq," said Director General of Police (DGP) K B Singh.
Siba Narayan Mohapatra, the hotel manager who interacted with one of the four men, said "While one of them came to the hotel reception desk, three others were inside the car parked outside. The CCTV has captured the picture of one suspected terrorist and the vehicle used by them."
Commissioner of Police R P Sharma said they had come to stay in the hotel at about 9 pm last night but fled when they were asked to produce identity proof before being given rooms.
More From This Section
The police have seized the CCTV footage from the hotel.
"In the wake of the incident, the security of the Chief Minister's carcade has been beefed up. We don't want to take any chances and have heightened security and frisking," Sharma said.
The Special Task Force (STF), led by IG Arun Bothra of Crime Branch of Police, has started investigation into the incident and launched an operation to trace the four men.
The team searched different hotels and lodges to locate the missing suspected terrorists.
(Reopen DEL33)
Odisha police this evening released CCTV grabs of the vehicle and one of the suspected persons.
While Superintendents of police of all the districts have been alerted, the police have intensified frisking and checking in the state capital besides sealing all the entry and exit points to Bhubaneswar, the Commissioner of Police said.
Sharma said the police suspected that there was a plan to disrupt the Republic Day celebration as the suspicious men attempted to stay in a hotel which is barely 300 metres from the state level parade venue at Mahatma Gandhi Marg.
The STF has questioned the hotel staff and others who had interacted with the suspected persons.