Claude Joseph, who has nominally led Haiti as acting prime minister since the July 7 assassination of President Jovenel Moise, says in a Washington Post interview he has agreed to step down, handing power to a challenger backed by the international community.
The announcement appears to end a power struggle in the Caribbean country between Joseph and Ariel Henry, the 71-year old neurosurgeon who was appointed prime minister by Moise two days before the killing but had yet to be sworn in.
Moise was fatally shot when attackers armed with assault rifles stormed his private residence in the hills above Port-au-Prince.
The assassination has pitched Haiti into chaos, coming amid a surge in gang violence that has displaced thousands of people and hampered economic activity in the poorest country in the Americas.
Joseph told the Washington Post that he and Henry had met privately over the past week, adding that he agreed to step down on Sunday "for the good of the nation" and is willing to transfer power "as quickly as possible".
"Everyone who knows me knows that I am not interested in this battle or in any kind of power grab," Joseph said.
"The president was a friend to me. I am just interested in seeing justice for him," Joseph added.
Martine Moise, the assassinated president's widow, returned to Haiti on Saturday for his funeral after she was treated in a Miami hospital for injuries sustained during the attack.