A school just outside the Yemeni capital of Sana'a has been hit by a Saudi-led coalition air strike, the rebel news agency has said. 

Saba, the news service run by the dominant Houthi movement since it seized control of Sana'a in 2015 said that four missiles had hit the Guards School building north of the capital. 

The strike took place on Sunday, which is a working day in most of the Musliminfo-icon worldinfo-icon.  No casualties have yet been reported.

At least two civilians have died in the last 24 hours thanks to more than 45 strikes across the country, Saba said, citing Houthi officials. Agence Franceinfo-icon-Presse reported that 70 people had been killed in fresh fighting, according to medics.

Forces loyal to President Abedrabbo Mansour Hadi launched a vast offensive on January 7 to retake the Dhubab district overlooking the Bab al-Mandab, a key maritime route connecting the Red Sea and the Indian Ocean.

Coalition warplanes and Apache attack helicopters have been pounding rebels in support of pro-Hadi forces advancing towards the Red Sea city of Mokha, military sources said.

By Sunday, loyalist forces were within 10 kilometres (six miles) of Mokha, they said, but the offensive has been slowed by mines laid by rebels.

The rebels took their dead to a military hospital in Hodeida, a major western port city they control, a medical source told AFP.

The hospital received 14 dead on Saturday and 38 on Sunday, as well as 55 wounded rebels, the source said.

On the pro-government side, 14 soldiers were killed and 22 wounded, according to medics in the southern port city of Aden where Hadi's government is based.

The Saudi-led coalition intervened in Yemeninfo-icon in March 2015 in support of the beleaguered president.

More than 10,000 people have died since the conflictinfo-icon in Yemen descended into full-scale civil warinfo-icon almost two years ago, the UN says. The fighting has also exacerbated hunger and disease in the Middle Eastinfo-icon's poorest country. 

A Saudi-led coalition has intervened on behalf of Yemen's exiled government since March 2015 against the Iraninfo-icon-allied Houthi movement in what Riyadh says is aimed at curbing creeping Iranian influence in the region.

The campaign has been widely criticised for hitting civilian infrastructure, including the bombing of a Sana'a funeralinfo-icon that killed 140 people in October last year. 

Several Western governments - including the UKinfo-icon - have also been rebuked for selling arms to Saudi Arabiainfo-icon, which rights groups say are destined for use in the conflict.

All previous attempts to broke a peace deal between the Yemeni government and rebels have so far failed. 

Elsewhere in the country, two suspected members of al-Qaeda's Yemen branch were killed in what local officials said was a USinfo-icon drone strike over the weekend.

If confirmed, the strike is the first such attack to have taken place since US President Donald Trumpinfo-icon took office on Friday.

The Trump administration has not yet laid out a clear policy on drone strikes.