WASHINGTON- The United States has delivered dozens of Hellfire air-to-ground missiles to Iraq in recent weeks and plans shipments of Scan Eagle drones next year amid a surge in violence, U.S. officials said on Thursday, a day after at least 34 people died in Christmas day bomb attacks in Baghdad.Al Qaeda-linked militants have stepped up attacks on Prime Minister Nuri al-Maliki's Shi'ite-led government and anyone seen to be supporting it. The United Nations estimates that more than 8,000 people have been killed in attacks in Iraq this year.A US official said that about 75 Hellfire missiles were delivered to Iraq last week, earlier than originally envisioned, and a shipment of 10 unmanned Scan Eagles surveillance drones is due next year.