A drone strike targeted Iraq’s prime minister at his Baghdad residence early Sunday, but he was unharmed, according to an official account.

       “I am fine, praise be to God, and among my people,” Prime Minister Mustafa al-Kadhimi wrote on Twitter shortly after the attack.

       “The missiles of treachery will not discourage the believers, and not a hair will be shaken in the steadfastness and insistence of our heroic security forces to preserve the security of the people,” he added.

       A government statement carried by official media said that a “booby-trapped drone” had targeted Mr. al-Kadhimi at his residence in the fortified Green Zone of Baghdad. “He is in good health,” the statement read.

       The government did not identify any suspected attackers, and there was no immediate claim of responsibility.

       The drone strike followed clashes in Baghdad between security forces and supporters of pro-Iran militias, who claim to have been victims of electoral fraud in the parliamentary elections held last month. The pro-Iran groups’ allies lost seats in the vote, and the Shiite cleric Muqtada al-Sadr’s bloc emerged as a big winner.

       A State Department spokesman, Ned Price, called the strike Sunday an “apparent act of terrorism” that was “directed at the heart of the Iraqi state.”

       Sara Aridi contributed reporting.