The Libyan government arrested four people Thursday in connection with the deadly attack on the American consulate Tuesday night as Libyan and U.S. officials mounted a manhunt for others believed to be involved. Ambassador Christopher Stevens in Benghazi, a family friend told CBS Boston on Thursday. It was done by an external group we believe has at least extremist ties, maybe al Qaeda ties, and the style and the signature of the attack clearly would be something that we have seen before and would be in line with something al Qaeda would do." The third and fourth Americans killed in the attack on the U.S. consulate were identified by the State Department late Thursday as security personnel Tyrone S. Woods and Glen A. Doherty, both former Navy SEALs. A third victim has been identified as Foreign Service Officer Sean Smith, an Air Force veteran who had worked as an information management officer for 10 years in posts such as Brussels, Baghdad and Pretoria. Wanis al-Sharef, eastern Libya's deputy interior minister, said Stevens and another American were killed in the consulate as plainclothes Libyan security were evacuating them to the safe house. But the U.S. has ramped up intelligence collection in the region, using unmanned aerial drones and other sophisticated eavesdropping equipment, officials said. Romney doubles down on WH criticism of attacks 
 
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 The White House says President Obama called the presidents of Libya and Egypt Tuesday and urged them to continue working with the United States to ensure the safety of diplomatic personnel. "He was on security detail and he was protecting the ambassador and also helping the wounded"' when he was killed, his sister, Katie Quigly told the Boston Globe.
– Four people have been arrested for their connection to the protests at the US consulate in Libya that left four Americans dead, including Ambassador Chris Stevens, information management officer Sean Smith, and a former Navy SEAL. There may be more arrests in the near future, as security forces in the country say they have a large group of people in custody and are monitoring others who may be connected to the protests, reports the Wall Street Journal. Meanwhile, the name of the third victim has come to light. Family of 42-year-old Glen Doherty, the former SEAL who hailed from a Boston suburb, has confirmed that he was killed in the attacks, reports CBS News. The identity of the fourth American victim remains unknown.