The Saudi airstrikes targeted a local market in Ta'iz province in Southwestern Yemen, killing at least 40 Yemeni civilians, including women and children.
At least 15 other Yemeni people were injured in the Saudi air raids.
In a relevant development on Tuesday, at least 20 civilians were killed in Saudi airstrikes on Ta'iz Province.
Saudi warplanes bombed Hayfan district of Ta'iz, leaving at least 20 civilians dead and 15 others injured.
Some Yemeni media outlets have put the number of the dead at 35.
The news comes hours after four terrorist bomb attacks hit military and security positions in Mukalla city of Hadhramaut Province, leaving 48 civilians dead and some 30 others injured.
Meanwhile, a Saudi jets mistakenly hit a military convoy of pro-Riyadh militants in the strategic mountain of Hailan in Ma'rib Province on Monday night.
Five militants, including a commander, were killed and six others wounded in the air raid.
Saudi Arabia has launched the invasion to restore power to former President Abd Rabbuh Mansur Hadi in the Arab world's most impoverished country since March 2015.
More than 9,800 people have been killed and at least 16,000 others injured since the onset of the aggression.
Tensions have intensified recently in Yemen when the UN briefly blacklisted Saudi Arabia after an expert report found it responsible for 60 percent of the 785 children killed in Yemen last year.
The blacklisting infuriated the Saudis, and the UN removed Riyadh from the list under "undue pressure" from the kingdom and its allies which threatened to cut funds to the United Nations.
The Saudi government has requested that the UN send a team of experts to Riyadh to jointly review the report and for the UN to provide details on its sources and methods.
US Secretary General, Ban Ki Moon has accused Riyadh and its allies of financial blackmail but has landed himself in hot water amid questions raised about his integrity for submitting to the Saudi pressure.
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