A U.S. airstrike in Baghdad on Thursday killed an Iran-linked militia commander and risked accelerating the regional fallout from Washington’s support for Israel’s military operation in Gaza, even as the Biden administration scrambles to contain the bloodshed. Explosions occurred in the central part of the city, rattling windows and prompting Iraqi authorities to close off streets nearby. Harakat Hezbollah al-Nujaba, a militia that has claimed several attacks on U.S. forces, said in a statement that its deputy commander of operations in the Baghdad region, Mushtaq Jawad Al-Saidi, known as Abu Taqwa, was killed in a strike at a logistical support headquarters on Palestine Street