Yemen camp bombing - what you need to know

At least 29 people were killed on Monday after a camp for displaced Yemenis was allegedly hit by an air strike. Here is what we do and don't know.

What happened?

In the late morning, the Mazraq camp in northern Yemeni province of Hajja - close to the border with Saudi Arabia - was bombed.

It is the latest hit on a civilian target since a Saudi-led coalition of eight nations began a bombing campaign last Thursday aiming to displace the Iranian-backed Houthi rebel group from power.

The exact death toll is as yet unconfirmed, but the International Organization for Migration (IOM) is saying 45 people have been killed.

Issa, a resident of the camp, put the number of deaths at between 30-40.

Pablo Marco, Programme Manager for Middle East at Medicins Sans Frontiers (MSF), told IRIN there were 29 dead on arrival and at least 34 injured in the hospital they run in the nearby town of Haradh.

What was the target?

The intended target of the attack is as yet unknown. It is also not known who carried out the strike. There was speculation that it was the work of the Saudi-led coalition, but Yemen's foreign minister has blamed Houthi fighters.

Around 500 families had fled to Mazraq camp in recent days, the majority from Saadah, Marco said. Their team had arrived the day beforehand to aid those fleeing the bombing.

Nicoletta Giordano, Yemen Chief of Mission for IOM, said that a medical facility in the camp and the camp management building were hit in the attack.

Issa said he was not aware of any military targets in the area. "They [the Saudis] are trying to scare us. The people here are terrified."

Who is responding?

Giordano said all humanitarian bodies were racing to the aid of those injured.

"The entire community has rushed to help, including us who do not normally deal with IDPs [internally displaced people]," she said.

The Hajja district where the camp is located has a high rate of food insecurity

IOM runs two medical clinics in Haradh, about 40 kilometres from the camp.

"In the past few days we have been overwhelmed with requests to use our facilities," she said. "Our medical facilities are usually for migrants but in this case we have opened [them up to Yemenis]."

Marco said he was unsure if the hospital had enough capacity to aid all those in need if attacks continue and more wounded arrive in the coming days. "We are preparing an additional team to go to Haradh," he said.

He added MSF is seeking to bring non-food supplies to Haradh in order to support the displaced in the area.

Who lives there?

The camp was set up in 2009 during the wars between the Houthis and the former President Ali Abdullah Saleh's army. The majority fled from Saada and other predominantly Houthi areas.

The residents live in conditions of dire poverty in incredibly tough conditions.

There were originally three camps at Mazraq, set up to receive Saada IDPs in 2009. The UAE's Red Crescent organisation used to run Mazraq II but handed over the site to local partners in 2011.

The UAE, along with other Gulf countries, is backing the Saudi-led bombing campaign in Yemen.

According to UNHCR, there are around 103,014 IDPs in the Saada region - accounting for one third of all IDPs in Yemen.

Saleh has since joined forces with the Houthis against his successor Abdu Rabu Mansour Hadi, who was placed under house arrest in September when the Houthis took control of the capital Sana'a.

Hadi has since escaped and has fled the country, but is supportive of the Saudi strikes.