(CNN) - The search for a missing airliner with 162 people aboard will expand Tuesday, the Indonesian government announced.
Four additional areas will be searched, the national search and rescue agency said.
Seven zones were patrolled Monday, the second day of searching for AirAsia Flight QZ8501. So far, the search has been fruitless.
"Our early conjecture is that the plane is in the bottom of the sea," said Bambang Sulistyo, the head of the search and rescue agency. That belief is based on the plane's flight track and last known coordinates.