"However, search by all sensors with night capability and the ground party will continue throughout the night. All possible assistance is being provided by Indian Army, Indian Navy, police and state administration," he said.
Officials said the area has thick vegetation and difficult terrain which are making the rescue operation challenging.
The IAF on Monday said the aircraft took off from Jorhat at 12.27 pm for the Menchuka advance landing ground in Shi-Yomi district in Arunachal Pradesh, and its last contact with the ground control was at 1 pm.
A total of eight aircrew and five passengers were on board the aircraft.