Sanaa--Iran has also announced it is sending an aid ship to Yemen, prompting a fresh war of words with Washington.
Iranian Brigadier General Masoud Jazayeri warned the US against stopping the ship, after Washington said it was tracking its movements.
Jazayeri said that if Saudi Arabia or the United States "continue to create obstacles on Iran's aid delivery, a fire might start that would definitely be out of their control."
It took several hours for the ceasefire to take hold inside Yemen, with residents and loyalists reporting continued skirmishes in the southern provinces of Daleh and Shabwa, as well as in third city Taez and the eastern oil province of Marib.
But by Wednesday morning residents said the fighting had largely stopped.
The newly appointed UN envoy to Yemen, Ismail Ould Cheikh Ahmed, arrived in Sanaa on Tuesday for talks on restarting a collapsed political dialogue.
AFP