AMMAN (Reuters) - At least two U.S. military trainers were shot dead in Jordan on Friday when the car they were in failed to stop at the gate of a military base and was fired on by Jordanian security forces, a Jordanian military source said.
"There was an exchange of fire at the entrance to the base after an attempt by the trainers' vehicle to enter the gate without heeding orders of the guards to stop," the military source said.
The incident occurred at the Prince Faisal air base in the south of the country, which is a close ally of the United States.
Another U.S. trainer was injured and a Jordanian army guard was also shot and wounded during the exchange of fire.
"An investigation is now under way to know exactly what happened," the source said.
Jordan is among a few Arab states that have taken part in a U.S.-led air campaign against the hardline Islamic State militant group, and is one of the largest recipients of Washington's foreign military financing.
The U.S. army has hundreds of trainers in the country. Since the start of the Syrian conflict in 2011, Washington has spent millions of dollars to bolster Jordan's border defenses and stem infiltration by militants from Syria and Iraq.
(Reporting by Suleiman al-Khalidi; Writing by Tom Perry; Editing by Mark Trevelyan)