Overnight, a bomb detonated outside the U.S. Diplomatic Mission in Benghazi, Libya which marked the first time a U.S. facility had been targeted since the overthrowing of Muammar Gaddafi. An official at the U.S. embassy in Tripoli stated that no injuries resulted from the blast. Analysts have suggested that the attack may have been in retaliation for the killing of Libyan citizen and al Qaeda's second-in-command Abu Yahya al-Libi. Al-Libi was confirmed dead after a U.S. drone strike in Mir Ali, North Waziristan on the morning of June 4th.
This attack against the U.S. Diplomatic offices in Benghazi comes immediately after reports of rebels seizing the main airport in the Libyan capital. The incident is described as an improvised explosive device (IED) attack in which the IED was placed on an unspecified roadway in the vicinity of the Embassy compound, close enough to damage the front gate. This appears to be an isolated event with no small arms fire or follow-on attacks. The standoff distance and on-site security measures created a 'buffer' between the explosive device and U.S. government personnel in the facility.
For more on the attack, please see the following article from Reuters:
http://www.reuters.com/article/2012/06/06/us-libya-attack-us-idUSBRE8550GX20120606