Who is Abu Waala al Wa'eli, on whom US has offered ₹94 cr reward?

The US has announced a $10 million (₹94 crore) reward for information leading to the arrest of Abu Waala al Wa'eli. He leads Kata'ib Sayyid al Shuhada, an Iraqi militia aligned with Iran's IRGC. The group has attacked US forces in Iraq on several occasions. They increased their activity during the ongoing war in Iran, carrying out almost 1,000 strikes.