Story highlights Local official says he warned U.S. diplomats about security in the area

"The situation is frightening, it scares us," the official says

He says it was not the first time he warned foreigners about the worsening security

Three days before the deadly assault on the United States consulate in Libya, a local security official says he met with American diplomats in the city and warned them about deteriorating security.

Jamal Mabrouk, a member of the February 17th Brigade, told CNN that he and a battalion commander had a meeting about the economy and security.

He said they told the diplomats that the security situation wasn't good for international business.

"The situation is frightening, it scares us," Mabrouk said they told the U.S. officials. He did not say how they responded.

Mabrouk said it was not the first time he has warned foreigners about the worsening security situation in the face of the growing presence of armed jihadist groups in the Benghazi area.

Photos: Photos: Attack on U.S. mission in Benghazi Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Attackers set the U.S. mission in Benghazi, Libya, on fire on September 11, 2012. The U.S. ambassador to Libya, Christopher Stevens, and three other U.S. nationals were killed during the attack. The Obama administration initially thought the attack was carried out by an angry mob responding to a video, made in the United States, that mocked Islam and the Prophet Mohammed. But the storming of the mission was later determined to have been a terrorist attack. Hide Caption 1 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Obama and Clinton stand at Andrews Air Force Base as the bodies of the four Americans killed are returned on September 14. Hide Caption 2 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A desk sits inside the burnt U.S. mission on September 13, two days after the attack. Hide Caption 3 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Damage is seen inside the U.S. mission on September 13. Hide Caption 4 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A lounge chair and umbrella float in the swimming pool of the U.S. mission on September 13. Hide Caption 5 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Demonstrators gather in Libya on September 12 to condemn the killers and voice support for the victims. Hide Caption 6 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – U.S. President Barack Obama, with Secretary of State Hillary Clinton on September 12, makes a statement at the White House about Stevens' death. Hide Caption 7 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A burnt vehicle is seen at the U.S. mission in Benghazi on September 12. Hide Caption 8 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – People inspect the damage on September 12. Hide Caption 9 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A small American flag is seen in the rubble on September 12. Hide Caption 10 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A man stands in part of a burned-out building of the U.S. mission on September 12. Hide Caption 11 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Smoke and fire damage is evident inside a building on September 12. Hide Caption 12 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Half-burnt debris and ash cover the floor of one of the U.S. mission buildings on September 12. Hide Caption 13 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – The U.S. mission is seen in flames on September 11, the day of the attack. Hide Caption 14 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A protester reacts as the U.S. mission burns on September 11. Hide Caption 15 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle and the surrounding area are engulfed in flames on September 11. Hide Caption 16 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Flames erupt outside of a building on September 11. Hide Caption 17 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle burns during the attack on the U.S. mission on September 11. Hide Caption 18 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Onlookers record the damage from the attack on September 11. Hide Caption 19 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – Onlookers walk past a burning truck and building on September 11. Hide Caption 20 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – A vehicle sits smoldering in flames on September 11. Hide Caption 21 of 22 Photos: Photos: Attack on U.S. mission in Benghazi Attack on U.S. mission in Benghazi – People duck flames outside a building on September 11. Hide Caption 22 of 22

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The main building in the compound is in charred ruins.

The suite where the body of the ambassador was found was protected by a large door with steel bars; the windows had steel bars.

His body was recovered after looters broke into the room. It appears his security detail left him in the room while they tried to deal with the attack.

There are numerous questions about what happened at the consulate where protesters had gathered to demonstrate against the film "Innocence of Muslims," which reportedly was made in California by a filmmaker whose identity is unclear.

Chief among the questions is what happened to U.S. Ambassador J. Christopher Stevens , who went missing during the attack.

The State Department has not released details about how Stevens died, though numerous media reports have said the ambassador was taken from the consulate to the Benghazi medical center by locals.

He arrived at the hospital, according to the reports, unresponsive and covered in soot from the fire. A doctor was unable to revive him and declared him dead, the reports said.

According to one of the Libyan security guards who was stationed at one of the gates armed with only a radio, the assault began simultaneously from three directions.

Heavy machine guns and rocket -propelled grenades were used, according to the guard. He said masked men threatened to kill him at gunpoint for 'protecting the infidels. He declined to appear on camera for fear of repercussions.

The February 17th Brigade -- a militia connected to the government but not part of Libya's armed forces -- was closely involved in the rescue of the American staff trapped after the attack Tuesday night.

After the consulate was attacked and set on fire, a number of Americans escaped to a safe-house in another part of the city. But that came under attack too.

Mabrouk said he received a call from an official in Tripoli, who said he had been called by a "terrified" American in Benghazi.

The official was at the safe-house. Mabrouk says the Brigade asked the Americans if they needed help -- but were told that while the situation was dangerous, it was under control.

A few hours later, Mabrouk said he received another call from Tripoli about the arrival of a U.S. team at Benghazi airport that needed transport into the city.

He met the seven Americans, who were heavily armed but not in military uniform, on the runway and provided them with an armed escort, he said.

As soon as the two vehicles carrying the seven Americans arrived at the safe house, they came under intense attack -- including a volley of grenades and machine-gun fire. The assailants then fled.

The Libyan government has vowed to bring the perpetrators of the attack to justice. But on a visit to the heavily-damaged consulate, the country's president said Libya expected help form its friends in the international community.

Asked whether the government was not capable of controlling extremist groups, he responded "You are not far from the truth."