At least 15 Yemenis have been killed in a Saudi airstrike in Hudaydah that has become a flashpoint of a war being waged by Riyadh and its allies against the Arab world's poorest nation.

The fatalities occurred when Saudi planes targeted two buses that were carrying civilians fleeing Hudaydah on Saturday, according to a report by Yemen’s al-Masirah television network.

The attack also injured an unspecified number of others, with the number of fatalities most likely to rise, al-Masirah reported.

No further details about the incident have come out as of yet.

In August, a Saudi air raid hit a school bus as it drove through a market in the town of Dhahyan in Sa’ada Province in northwestern Yemen, killing a total of 51 people, among them 40 children, and injuring 79 others, mostly children.

Saudi Arabia began its invasion in March 2015 to restore power to Yemen’s former Riyadh-allied officials. Around 15,000 people have died since the war began, says Yemen’s Health Ministry.

The invasion has pushed the country close to the brink of famine.

Hudaydah came under a concerted invasion by Saudi Arabia and the UAE in June. The offensive has raised the prospect that the nation could be tipped over the edge of famine as the port city takes in the bulk of Yemen’s vital imports.

Press TV’s Yemen correspondent Mohamad al-Attab reported on Friday that the raids on Hudaydah have intensified in recent weeks, prompting thousands of families to seek refuge elsewhere in the country.