People walk past damaged cars at the entrance of Al-Thawra hospital after an air strike.
According to a doctor at Al Thawra Hospital many injured have been transferred to other hospitals and "there is a large number of deaths, and we can not count now because the number is large, above the capacity of the hospital".
Saudi-led coalition began major attack six weeks ago on Hodeidah.
There was no immediate comment from the Saudi-led coalition.
It is not yet clear whether the parties involved-President Hadi's lawful government, backed by a Saudi-led global coalition, and the Houthi rebels-will take part in the negotiations or not, or in what context they will take place.
Most of the aid supplies arriving in Yemen come through Hodeidah.
Yemen's government maintains the rebels' "unconditional withdrawal" from Hodeida is key to restarting the talks.
Lise Grande, UN humanitarian coordinator for Yemen, earlier said hundreds of thousands of people depend on Al-Thawra.
The Saudi-led coalition denied responsibility for the attack, saying it did not carry out any operations in the area that day.
Describing the ongoing the battle for Hudaydah, a port city on the Red Sea, as "the centre of gravity of the war", he stressed that the gap between the two sides is being narrowed "in a way that nobody expected".
The halt to retaliatory attacks in the Red Sea is aimed at "preserving the Yemeni bloods and in response to the regional and global moves and efforts aiming to bring peace", he noted.
The Center also expressed its condolences to the families and families of the victims, stressing its continued efforts and maximum cooperation to assist the Yemeni people in coordination with the Yemeni government, coalition forces and humanitarian and relief organizations operating in Yemen.
Yemen's war has killed almost 10,000 people, with more than eight million Yemenis at risk of starvation.
"We have given them time for a political solution and also, many opportunities", he said.
The United Nations Yemen mediator said on Thursday he plans to invite the warring parties to Geneva on September 6 to discuss a framework for peace talks and confidence-building measures as he tries to negotiate an end to the more than three-year conflict.
On Friday, the UN's World Health Organisation said Yemen may be on the brink of a new cholera epidemic, with greater chance of a high death rate due to widespread malnutrition.