Sharm el-Sheik, Egypt ? Investigators identified an Egyptian as a possible suicide bomber in the terror attacks at this Red Sea resort and were searching Tuesday for his suspected Islamic militant cohorts – the first break in the probe.

The development came as two security officials revealed that authorities received information of an imminent terror attack in Sharm el-Sheik several days before the bombings Saturday. But they believed casinos would be targeted, so security was increased around those sites, not hotels.

The officials would not say where the tip came from but said headquarters in Cairo told security forces in Sharm to be on alert and to step up measures around key locations.

It appeared authorities chose the wrong possible targets to watch, said one of the officials in Cairo. Both officials are close to the inquiry and spoke on condition of anonymity because the information was not authorized for release.

Security was heightened around casinos on the theory they would be attacked because Israelis come to Sharm for gambling, which is banned in their country.

The government has sacked the heads of security in North and South Sinai provinces, an apparent sign of the failures that may have allowed the assault on one of Egypt’s most closely guarded tourist towns.

Instead of going after casinos, bombers in two explosives-laden trucks targeted hotels. One plowed into the Ghazala Gardens reception area, leveling the lobby. A second headed for another hotel but got caught in traffic and blew up before reaching the target. A third explosive device, hidden in a knapsack, went off minutes after the Ghazala blast at the entrance to a beach promenade. As many as 88 people were killed.

Police had been studying two bodies found at the Ghazala as possible bombers because the remains were dismembered. DNA tests identified one of the bodies as that of Moussa Badran, an Egyptian resident of Sinai who police said has links to Islamic militants.

Initially, officials said the body was that of Badran’s brother Youssef. The officials, who spoke on condition of anonymity because the release of the details had not been authorized, did not give a reason for the change in identification.

The second body from the Ghazala is still being tested. A third body in Sharm’s Old Market, the site of the other truck explosion, is also being examined as a possible bomber.