Picture: Phil helsel

Several U.S. soldiers were treated for concussions after Iran fired ballistic missiles in Iraq earlier this month in retaliation for the US's murder of a top Iranian commander, the Pentagon said Thursday.

"While no US soldiers were killed in the Iranian attack on January 8th … several have been treated for concussion symptoms of the explosion and are still under investigation," said Capt. Bill Urban, spokesman for the U.S. Central Command, said.

"All employees in the vicinity of an explosion are examined for traumatic brain injuries and, if considered appropriate, brought to a higher level of care," said Urban.

In the days after the attack, eleven service members were transported to two hospitals in Germany and Kuwait for follow-up visits, Urban said.

He said service members may return to Iraq after the screening.

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The damage to Ain al-Asad military airport, which housed the United States and other foreign troops in Anbar province, Iraq, on January 13, 2020.Ayman Henna / AFP – Getty Images

The day after the missile attacks, President Donald Trump said that no American or Iraqi lives were lost through precautions, division of the armed forces, "and an early warning system that worked very well." The president also said at the time that no Americans were injured.

Centers for disease control and prevention say that while some symptoms of traumatic brain injury, including concussions, may appear immediately, others may not be noticed until days or months after the injury.

Iran fired ballistic missiles at two Iraqi bases on January 8 that hosted US forces, including Ain al-Asad approximately 180 kilometers northwest of Baghdad Force and another man who served as a proxy for the militias in Iraq applies.

Hours after the launch of the ballistic missile in Iraq, the Iranian military unintentionally shot down a Ukrainian passenger jet from Tehran Airport.

All 176 people aboard Ukraine International Airlines flight PS752 were killed, including many Iranians and Canadians.

Iranian officials blamed "human error" and Iranian President Hassan Rouhani called it a "catastrophic mistake".

Initially, Iranian officials soon said that a mechanical defect was suspected. The Iranian Foreign Minister admitted this week that people were "lied to" for days.

The launch triggered protests in Iran.

The Iranian judiciary announced this week that an unknown number of suspects involved in the accidental dropping of the plane had been arrested.