BAGHDAD: US forces stationed at Iraq’s Ain Al-Asad air base were targeted in an armed drone attack that caused no damage or casualties, a US official said, in the second attack on US troops in the region in less than 24 hours. The attacks follow a near-three month pause in the targeting of US forces in Iraq and Syria after months of near-daily rocket and drone strikes by Iran-backed Shiite Muslim armed factions over US backing of Israel’s Gaza campaign.