WSJ News Exclusive | Hamas Fighters Trained in Iran Before Oct. 7 Attacks

TEL AVIV—In the weeks leading up to Hamas’s Oct. 7 attacks on Israel, hundreds of the Palestinian Islamist militant group’s fighters received specialized combat training in Iran, according to people familiar with intelligence related to the assault.

Roughly 500 militants from Hamas and an allied group, Palestinian Islamic Jihad, participated in the exercises in September, which were led by officers of the Quds Force, the foreign-operations arm of Iran’s Islamic Revolutionary Guard Corps, the people said.