0527 GMT July 21, 2019
The first day of the redeployment by Houthi fighters from the ports of Hodeida, Saleef and Ras Issa on Saturday "went in accordance with established plans," a UN statement said, AFP reported.
"All three ports were monitored simultaneously by United Nations teams as the military forces left the ports and the Coast Guard took over responsibility for security," it added.
Military equipment is expected to be removed in the coming days, while demining is also planned, the statement said.
Formal verification of the first redeployment will take place at the three ports on Tuesday, according to the UN.
Hodeida port serves as a lifeline for millions in the impoverished Arabian Peninsula country, which has been pushed to the brink of famine by more than four years of devastating war.
The pullback is considered a first step in implementing a hard-won truce agreement for Hodeida struck in Sweden in December between Yemen's Saudi-backed former government and the Houthi fighters.