The Prince Sultan Air Base was under fire, Fox correspondent Jennifer Griffin reported after a senior military official alerted her Saturday evening. 

The US base, located roughly 40 miles from the Saudi capital Riyadh, is being defended by Saudis who are shooting missiles down, according to Griffin.

“This is a big escalation,” she said, noting the significance of Saudi Arabia joining the conflict.

Iran has launched at least 300 missiles and drones at US military bases across the Middle East, but with no serious damage, she added.

Akeem Ferguson was in a bunker when his team received the bone-chilling radio transmission: Six Iranian ballistic missiles were headed in their direction.

The concrete slab they had taken cover under offered little protection from projectiles that US troops in Iraq were being attacked with.

“I held on to my gun and put my head down and I tried to find a happy place, so I started singing to my daughters in my head,” said the six-foot tall US staff sergeant. “And I just waited. I hoped that whatever happened, that it was quick.”

“I was 100% ready to die,” he added.

Sergeant Ferguson outside a US-made military bunker, similar to the one he took cover in on the night of the Iranian attacks.

Ferguson survived unscathed along with other US troops and civilian contractors on Iraq’s al-Asad base, after a barrage of Iranian ballistic missiles on the morning of January 8.

The strike was the widest scale attack on a base housing US troops in decades. Troops said the absence of casualties was nothing short of a “miracle.”

American troops stationed at the base are helping to counter ISIS and train Iraqi security forces. No Iraqi troops were hurt in the attack.