Three Mainers were injured Sunday morning during an insurgent attack in Mosul, Iraq.

Few details were available, but Maine Army National Guard spokesman Maj. Pete Rogers confirmed that the three were part of a convoy “that was involved in an IED [improvised explosive device] attack” Sunday morning.

Two of the injured Mainers were treated, then released to return to duty. The third, who suffered more serious injuries, was taken by helicopter to an unknown location for treatment.

An IED is a makeshift bomb that can be made out of anything, from a hand grenade to an artillery shell or dynamite, Rogers said. It wasn’t immediately clear what kind of explosive was used in Sunday’s attack, he said.

Just last week two soldiers from Maine were killed in an explosion in a mess tent, also in Mosul.

There was no new information Sunday as to when the bodies of the two men, both members of the Guard’s 133rd Engineer Battalion, would be returned to the United States, Rogers said Sunday.

The soldiers, Spc. Thomas Dostie, 20, of Somerville and Sgt. Lynn R. Poulin Sr., 47, of Freedom, were among 22 people killed in last Tuesday’s explosion.