US deputy secretary of state visits Libya after deadly attack

US Deputy Secretary of State William Burns arrived in Tripoli, a week after a deadly attack on the US consulate in the eastern Libyan city of Benghazi.

Burns flew into the Libyan capital where he was due to meet new Prime Minister Mustafa Abu Shagour and Mohammed Magarief, head of the national congress, Libyan government officials said.

He was also scheduled to attend a ceremony commemorating U.S. ambassador to Libya Christopher Stevens, who died in last week's consulate attack in Benghazi, they said.

Stevens and three other Americans died when gunmen attacked the U.S. consulate and a safe house. The attackers were part of a crowd that blamed the United States for a video posted online that mocks the Prophet Mohammad.

A top U.S. counter-terrorism official told Congress on Wednesday the assault on the consulate was a "terrorist attack" that may have had an al Qaeda connection.