SANAA, (Reuters) – Yemeni security forces shot and wounded, and arrested a gunman after he opened fire at the U.S. embassy in Sanaa late on Monday, a government official said on Tuesday. “He is now in hospital under heavy security and will be interrogated,” the official said.

An interior ministry official told Reuters the authorities were investigating the incident and identified the gunman as Salem Mohammad Elwan, a Yemeni.

The gunman opened fire with an AK-47 semi-automatic rifle at the fortified compound and was shot and wounded by members of the large Yemeni security force guarding the site. No embassy staff were hurt.

Yemen beefed up security round the embassy on Tuesday, increasing the number of guards and blocking a road leading to the compound. A U.S. diplomat told Reuters the embassy would be closed for the day but did not comment on the attack.

The embassy said in a statement posted on its Web site it would open to the public on Wednesday.

Yemen cracked down on al Qaeda-linked militants after an attack on the U.S. warship Cole in 2000 that killed 17 sailors.

An explosives-filled boat rammed the French tanker Limburg off the Yemeni coast in 2002.

Yemen, the ancestral home of al Qaeda leader Osama bin Laden, joined the U.S.-led war on terrorism after the Sept. 11, 2001 attacks in the United States.