Three personnel of the International Coalition were killed during a rocket attack on Camp Taji on Wednesday. The camp is an Iraqi base that hosts International Coalition personnel for anti-ISIS training and advising missions.

According to the statement of Combined Joint Task Force Operation Inherent Resolve, 12 other personnel were wounded during the attack in which 18 Katyusha rockets struck the base. The statement noted that Iraqi Security Forces found a rocket-rigged truck, a few miles from Camp Taji.

A few hours after the attack, ten strikes were reported in an area to the south of the Syrian city of al-Bukamal at the border with Iraq. According to the Syrian Observatory for Human Rights (SOHR), 26 members of the Iraqi Popular Mobilization Forces (Hashd al-Shaabi) were killed and another 15 were wounded as a result of the strikes that struck the militia’s headquarters in Al-Hasyan area in Al-Bukamal countryside on Syria-Iraq border.

Observatory sources monitored bombardment by three unidentified aircraft which targeted Al-Imam Ali base and al-Hasyan area in al-Bokamal, near the border with Iraq, where military headquarters of the Iranian-backed militias are located.

Wednesday's attack was the 22nd since October on US interests in Iraq, AFP reported.

US diplomatic offices have come under attack as well as the bases where the 5,200 American troops stationed in Iraq are based.

The previous attacks included the killing of an Iraqi soldier and a US contractor in late December, leading to a major uptick in tensions between Washington and Tehran.

Washington responded to the contractor's death with air strikes that killed more than two dozen Iran-backed Iraqi fighters.

Days later, a US drone killed senior Iranian commander Qassem Soleimani and Hashd al-Shaabi militias deputy chief Abu Mahdi al-Muhandis near Baghdad's airport prompting retaliatory Iranian air strikes against coalition troops in Iraq.

Factions of Hashd al-Shaabi have repeatedly pledged to avenge Muhandis's death.