U.S. President Donald Trump on Wednesday (July 22) will attend a ceremony for four U.S. service members killed in Iranian attacks in the Middle East, who will return to American soil in flag-draped caskets.

The ceremony, known as a "dignified transfer" of the bodies, comes amid growing frustration with Trump's war against Iran.

The three U.S. service members killed when an Iranian missile hit their sleeping barracks at Muwaffaq Salti Air Base in Jordan on Friday (July 20) were First Lieutenant Tyler James Feehan, 25, Sergeant Angel S. Rampersad, 28, and Private Isabella Gonzales, 19. All three were assigned to U.S. Army air defense brigades.

The fourth death, of Sergeant Michael Emmanuel Swinton, 30, occurred on Sunday (July 19) in a separate incident in Erbil, Iraq, during a controlled detonation of an attack drone.

Trump faced criticism for attending the Club World Cup final in New Jersey on Sunday, as conflict in the region continued to escalate.

The Pentagon said on Monday (July 20) that 100 service members have been injured since July 7 and 96% have returned to duty.

Trump will travel to Dover Air Force Base in Delaware for the ceremony.

U.S. presidents, vice presidents and dignitaries regularly attend the solemn transfer ceremonies at Dover - home of the largest U.S. military mortuary - during times of war or conflict that result in the deaths of U.S. troops.

DESCRIPCIÓN DE IMÁGENES

STILL PHOTOS: Trump to witness return of US soldiers killed in Iran war

VIDEO SHOWS: STILL PHOTOS OF U.S. SOLDIERS KILLED IN JORDAN AND IRAQ

RESENDING WITH COMPLETE SCRIPT

SHOWS: UNKNOWN LOCATIONS (ARCHIVE) (US ARMY HANDOUT – Access all)

1. COMPOSITE OF STILL PHOTOS OF U.S. ARMY 1ST LT. TYLER JAMES FEEHAN (LEFT), PVT. ISABELLA GONZALES (CENTER), AND U.S. ARMY SPACE AND MISSILE DEFENSE COMMAND SOLDIER SGT. MICHAEL EMMANUEL SWINTON (RIGHT), WHO WERE KILLED IN IRANIAN ATTACKS IN JULY

2. STILL PHOTO OF PRIVATE ISABELLA GONZALES

3. STILL PHOTO OF SERGEANT MICHAEL EMMANUEL SWINTON

4. STILL PHOTO OF 1ST LIEUTENANT TYLER JAMES FEEHAN

5. STILL PHOTO OF SERGEANT ANGEL RAMPERSAD