Millions of Shiite Muslims have observed the annual Arbaeen pilgrimage in Karbala, Iraq, amid regional tensions and fears of escalation in the U.S.-Iran conflict.

Under a blazing sun, clad in black and clutching portraits of their slain leader Ali Khamenei, Iranian pilgrims streamed across the border into Iraq to observe the Arbaeen, the…

Millions of Shi'ite pilgrims gathered in Iraq's holy city of Karbala for the Arbaeen pilgrimage, enduring temperatures of up to 50°C as authorities deployed cooling measures and…