The United States plans to deliver 1,000 anti-tank weapons to Iraq in June to combat Daesh suicide bombings like those that helped the group seize Ramadi, a senior U.S. State Department official said on Thursday.

The official, who spoke on condition of anonymity, said the militant group carried out about 30 vehicle suicide bombings to take the Iraqi city, about 10 of them roughly the size of the truck bomb that killed 168 people in Oklahoma City in 1995.

The United States decided to supply Iraq with anti-tank weapons when Iraq's prime minister visited Washington in April and plans to deliver 1,000 of the shoulder-fired AT4 systems in early June, the official told reporters.