The bombers who carried out Egypt's worst-ever terrorist attack appear to have entered this Red Sea resort in pickup trucks loaded with explosives that were hidden under vegetables, security officials said.
The police were searching for three suspects believed to have survived the bombings.
One truck headed for the luxury Ghazala Gardens hotel. There, one man planted a bomb in a suitcase in a parking lot, while another drove on to Ghazala and slammed his truck into the reception area, security officials said on Sunday.
As people fled the Ghazala attack, the suitcase exploded and killed at least seven people, said the officials.
A second truck, on a road leading to another major hotel, got stuck in traffic in the Old Market -- an area frequented by Egyptian workers. Two militants inside abandoned the vehicle, apparently setting a timer, and the blast detonated soon after, the officials said.
According to local hospitals, Saturday's pre-dawn bombings killed at least 88 people -- both Egyptians and foreigners; Egypt's Health Ministry put the death toll at 64.
Hospitals said the ministry count does not include a number of sets of body parts.
One official said he believed the man who planted the suitcase came separately, not in the attack truck, and he said police were looking for more than three people, though he would not elaborate.