Transcript for Rockets hit airbase in Iraq housing US troops
We're going to turn now to U.S. Troops and that rocket attack on a base with troops. We have images tonight now being reviewed by investigators showing the vehicle where the rockets were launched. And we also have news on that planned trip by the pope to Iraq. Here's our senior foreign correspondent Ian Pannell reporting from Iraq tonight. Reporter: Tonight, the hunt's on those for responsible for launching at least ten rockets from this flat bed truck in western Iraq. No troops were hurt but an American contractor died of a heart attack while sheltering from the attack. It's the same base hit by Iranian missiles in January last year, seen in these dramatic images just released. The president now weighing U.S. Options. We're identifying who is responsible and we'll make judgments from that point. Reporter: But an Iraqi commander at the base already pointing the finger of blame at iranian-backed militia groups, including ka tib Hezbollah. This group accused attacking an airport that killed a contractor and injured several Americans. It triggered the first military action under president Biden, with air strikes just across the border into Syria that killed at least one iranian-backed militia at the time, president Biden warning Iran. You can't act with imimpunity. Be careful. Reporter: The U.S. Is wary of escalating the cycle of attacks in the hopes of retalking delicate Iranian nuclear talks. Let's get to Ian Pannell tonight, where the pope will still be visiting in just a few days? Reporter: Yeah, incredibly, pope Francis making the first ever papal trip to Iraq, something he's wanted to do for years, despite the latest attack, despite the threat from ISIS, the pandemic and insecurity in the country. David? Ian Pannell and our team in northern Iraq tonight. Ian, thank you.
This transcript has been automatically generated and may not be 100% accurate.