TEHRAN: Iran's President Ebrahim Raisi vowed revenge against Donald Trump unless the former US president is tried over the killing of Qassem Soleimani, as Tehran marked two years since the revered commander's death.

The Islamic republic and its allies across the Middle East held emotional commemorations for General Soleimani and his Iraqi lieutenant who were assassinated in a US drone strike at Baghdad airport on January 3, 2020.

Tehran's arch enemies were targeted on the day of the anniversary in unclaimed drone and cyber attacks -- with two armed unmanned aerial vehicles intercepted by the US-led coalition in Iraq over Baghdad airport, and hackers attacking Israeli media sites.

Soleimani headed the Quds Force, the foreign operations arm of Iran's Revolutionary Guards, with links to armed groups in Iraq, Lebanon, the Palestinian territories, Syria and Yemen.

Raisi, addressing Tehran's largest prayer hall, said: "The aggressor and the main assassin, the then president of the United States, must face justice and retribution" alongside former US secretary of state Mike Pompeo "and other criminals".

"Otherwise, I will tell all US leaders that without a doubt the hand of revenge will emerge from the sleeve of the Muslim nation."

Trump -- under whom tensions over Iran's nuclear programme escalated, leading to a new and painful sanctions regime -- ordered the assassination which brought the enemies to the brink of a direct military confrontation.

Washington said at the time that Soleimani was planning imminent action against US personnel in Iraq, a war-battered country long torn between principal allies Washington and Tehran.

'Revenge operations'

The night-time strike destroyed a convoy carrying Soleimani and Abu Mahdi al-Muhandis, deputy leader of the Hashed al-Shaabi coalition of pro-Iranian armed groups, and others.

Iran responded days later by firing missiles at bases hosting US troops in Iraq. No one was killed but Washington said dozens suffered traumatic brain injuries.

Soleimani's funeral drew millions, and his martyr's portrait can now be seen on streets, in squares and on buildings from Tehran to southern Lebanon and Gaza.

Commemorations were held this year across Iran as well as at Baghdad airport, in the Iraqi city of Najaf, in Gaza City and elsewhere.

Before dawn on Monday, two armed drones targeted a Baghdad airport site used by the US-led coalition against the Islamic State group.

"Two fixed-wing suicide drones, or improvised cruise missiles, attempted to attack Baghdad Airport this morning at approximately 4:30 am" (0130 GMT), a coalition official told AFP in the Iraqi capital.

A counter-rocket, artillery and mortar, or C-RAM, system "engaged them and they were shot down without incident," added the source, speaking on condition of anonymity.

Photos obtained by AFP from the coalition official show remains of one of the drones.

In the Palestinian coastal enclave of Gaza, a ceremony was also held Monday to commemorate the second anniversary of the killings.

Later Monday the leader of Lebanon's Hezbollah movement, Hassan Nasrallah, was also due to speak.