WASHINGTON (Reuters) - Secretary of State Hillary Clinton will respond on Tuesday to U.S. lawmakers who wrote to her requesting information about an attack on the U.S. mission in Benghazi last month in which four people died, State Department spokeswoman Victoria Nuland said.

Clinton is ready to cooperate "closely" with Congress in investigating the attack in Benghazi, Nuland said at a regular daily news briefing.

Ambassador Christopher Stevens and three other Americans were killed in the assault on the mission the evening of September 11.

(Reporting By Susan Cornwell; Editing by Sandra Maler)