What kind of bombs did the IRA use in the omagh bombing?

The Omagh bombing, which occurred on August 15, 1998, involved a car bomb. The device was a vehicle-borne explosive, packed with over 500 pounds of explosives and shrapnel, including nails and screws, designed to maximize casualties. The bombing was attributed to a dissident republican group known as the Real IRA, and it resulted in the deaths of 29 people and injuries to over 200 others, making it one of the deadliest attacks during the Troubles in Northern Ireland.