As night fell on Saturday, the aerial attacks resumed for a fourth night, residents of Yemens capital of Sanaa said.
Saudi-led fighter jets have pounded the northwestern city of Saada. No casualties have been reported yet.
The city is the stronghold of Ansarullah fighters, against whom the warfare has been waged.
Dozens of people, including women and children, have been killed since early Thursday, when Saudi Arabia began the invasion of Yemen.
On Saturday, the United Nations said most of its 100 international staff were evacuated from Sanaa.
UN Secretary General Ban Ki-moon said on the same day that negotiations remain the only chance to prevent long, drawn-out conflict in Yemen. There was no sign of condemnation of the Saudi invasion in the UN chiefs remarks.
War waged for Hadi
Yemens fugitive President Abd Rabbuh Mansur Hadi arrived in the Saudi capital, Riyadh, on March 26.
[caption id="" align="alignnone" width="555"]
Yemens fugitive President Abd Rabbuh Mansur Hadi[/caption]Riyadh says it has launched the airstrikes to defend the legitimate government of Hadi upon his request.
Ali Abdullah Saleh, Yemens former dictator who stepped down in 2012 after a year-long popular uprising, has likewise said the Saudi-led attacks aim to save the fugitive president.
In a televised speech on Saturday, Saleh urged the Arab League to help end the crisis peacefully, saying the problem will not be solved with strikes.
Aden fatalities
Also on Saturday, a senior Yemeni health official said at least 61 people had been killed in three days of fighting between Ansarullah fighters and loyalist militia in Yemens main southern city of Aden.
There are at least 61 people dead and 203 wounded, said Aden health department director Al-Kheder Lassouar.
The situation has become increasingly tense in Aden, with supporters of Houthi fighters clashing with popular committees -- an anti-Houthi militia controlling parts of the city.
By Press TV
