Nine civilians killed in attacks in Yemen's Hodeidah and Hajjah

At least nine Yemeni civilians have been killed and 13 wounded by attacks in Hodeidah and Hajjah over the past week, according to the United Nations. 

In Hodeidah, eight people were killed and 10 wounded on Tuesday when an artillery shell hit a market to the west of the Tuhayta district, according to a statement by the UN Office for the Coordination of Humanitarian Affairs.

The statement added that unconfirmed reports indicated a woman was killed and three children injured the next day when a house was hit in the northern province of Hajjah.

"These attacks are unconscionable," said the UN's humanitarian coordinator for Yemen, Lise Grande.

"The country is facing the worst food security crisis in the world and yet the killing continues. Parties to the conflict are obliged to do everything possible to protect civilians."

She did not name the parties behind the attacks.

The statement said there had been 271 civilian casualties, including 96 fatalities, between 1 January and 14 February. 

More than 24 million Yemenis, more than three-quarters of the country's population, are now dependent on some form of aid for survival, according to the UN. 

Houthi rebels have since 2015 battled a pro-government military coalition, led by Saudi Arabia and the United Arab Emirates, for control of the impoverished country for four years.

Both parties are accused of failing to protect civilians in the conflict, described by the UN as the world's worst humanitarian crisis.

Around 10,000 people - mostly civilians - have been killed and more than 60,000 wounded in the conflict, according to the World Health Organisation. 

Human rights groups say the real figure could be five times as high.