"The CCTV footage indicates that the car used by the four suspected terrorists has crossed the check gate at Girisola bordering Andhra Pradesh. The vehicle bearing the same Delhi registration number crossed the check gate on the night of January 25, about seven hours after being sighted here," a senior police officer involved in the investigation said.
The Special Task Force, which is probing the incident with the central intelligence wing, has also contacted the police in Delhi, West Bengal and Chhattisgarh, he said.
Meanwhile, the city police has interrogated several persons, including one from Iran and another from Russia in connection with the case.
"Yes we have spoken to many people, but no information on the suspected four persons so far," deputy commissioner of police Satyabrat Bhoi said, adding cars bearing Delhi registration numbers are being tracked in different places.
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Inspector General Arun Botha, who is heading the STF team, said steps are being taken to locate the four persons who fled from the city.
The police have released CCTV grabs of the vehicle and one of the four suspected persons last evening and sought public help to nab them.
Director General of Police B K Singh had yesterday said the four were suspected to be terrorists.
The four men had estimated height of 6.5 feet and spoke in Hindi and English. They came to the hotel in a car with a Delhi registration number which turned out to be fake, police said.