source in Abyan. Al Qaeda in the Arabian Peninsula has a presence in the southern province of Abyan, a U.S. official said. It's also home to an Islamic militant movement that has targeted government troops in recent days. The Abyan dead include nine soldiers, four militants and two civilians in Zinjibar and other suburbs in the province, according to the source, who asked to not be named because he is not authorized to speak to the media. There was also violence along the Saudi-Yemeni border, where there have long been concerns of infiltration by militants. A man trying to cross into Yemen from Saudi Arabia early Tuesday fatally shot two security officers and wounded another, the state-run Saudi Press Agency said Tuesday. The man, described as an infiltrator who tried to cross the metal-and-sand barriers at the border, fired at the security officers when they approached him, the agency said. Security personnel tracked the man and he was killed in an exchange of fire, it added. The turmoil in Yemen peaked Friday, when a mosque in Saleh's presidential compound was attacked. Yemen's state-run news agency SABA, citing a source in Saleh's office, reported last week that three guards and an imam were killed. Western diplomats said the attack came from a bomb. Yemeni investigations are focusing on what happened inside the mosque, not a rocket or mortar attack, diplomats said Monday.