Yemen’s Hezbollah Movement Houthi fighters say the central government has kept its siege over the capital of the northern province of Sa’ada.

“The army continues to this moment to refuse to lift the siege on the city of Sa’ada,” the Houthis said on their website on Thursday, adding that the Yemeni soldiers were re-establishing military checkpoints on the newly-opened roads, Reuters reported.

“They are preventing citizens from entering their homes,” They said. The Houthis added that the government is also preventing food supplies from reaching the war-hit regions.

The Yemeni government intensified its armed campaign against the Hezbollahs in August, accusing the Houthis of taking foreign visitors hostage.

Some 187 children were killed as a result of the government and Saudi attacks during the war, said a recent report issued by UNICEF (the United Nations Children’s Fund) and the Yemen children’s rights organization.

The Houthi grievance on Thursday comes only two weeks after the parties reached a truce agreement.

The United Nations Children’s Fund (UNICEF) said Friday children have gone missing from hospitals in Haiti following the devastating earthquake in the country, raising fears they are being trafficked for adoption abroad.

“We have documented around 15 cases of children disappearing from hospitals and not with their own family at the time,” said UNICEF adviser Jean Luc Legrand.

“UNICEF has been working in Haiti for many years and we knew the problem with the trade of children in Haiti that existed already beforehand,” he said. “Unfortunately, many of these trade networks have links with the international adoption market.”

The UN agency said it has warned countries around the world during the past week not to step up adoptions from Haiti in the immediate wake of the quake, ABC News reported.

Despite the warning, many fast-tracking adoption procedures are already under way in Belgium, Canada, France, Germany, the Netherlands, Spain and the United States.

Rupert Colville, a spokesman for the office of the UN High Commissioner for Human Rights, said child enslavement and trafficking in Haiti was “an existing problem and could easily emerge as a serious issue over the coming weeks and months.”

The UN mission in Haiti has stepped up surveillance of roads, UNICEF officials said.

“We have seen over the past years many children being taken out of the country without any legal procedure,” Legrand said. “This is going on. This is happening now. We are starting to have the first evidence of that, this is unquestionable.”

He was unable to give details about 15 children missing from hospitals or their conditions.

A Houthi leader has slammed the United Nation for what he has described as the international body’s lack of action aimed at ending the “siege on civilians in northern Yemen.”

Yahya al-Houthi told Press TV on Thursday that the UN’s approach to the war is as if the body did not exist at all.

Al-Houthi said the civilians in the warzone were in dire need of food aid as the US and Saudi forces were effectively responsible for shutting off the region from the outside world.

He also strongly criticized international media for their coverage of the war in Yemen.

Earlier, several people were reportedly killed in air raids in the region. The residence of the mayor of Sa’ada was damaged in the airstrikes. Houthi fighters say the US and Saudi Arabia are carrying out air raids in northern Yemen — adding that they target only civilians.

This is while warnings from international aid agencies as well as the UN Children’s Fund (UNICEF) and UN High Commissioner for Refugees (UNHCR) have failed to draw action from the world body.

UNICEF and UNHCR fear Yemeni civilians are bearing the brunt of the conflict in the country.

The warnings come amid reports that fighter jets from neighboring Saudi Arabia, which has launched cross-border ground attacks against Yemeni fighters, have targeted Yemen’s northern areas with phosphorus bombs.

Yemen’s Houthi fighters also accuse the United States of partaking in the relentless airstrikes, saying the air raids are claiming the lives of civilians in surrounding villages.

Iran’s Foreign Ministry has expressed concern over the humanitarian implications of ongoing clashes in Yemen’s northern province of Sa’dah.

Foreign Ministry Spokesman Hassan Qashqavi cautioned, in an official statement on Tuesday, that a humanitarian crisis may be unfolding in the Arab state.

“The clashes in Yemen over the past month, especially the unrest in the recent days, have claimed the lives of many defenseless civilians, wounded numerous others and displaced thousands of innocent people,” Qashqavi said.

The spokesman reiterated Tehran’s previous stance on the conflict, and pointed out that the Islamic Republic believes the solution to Yemen’s problem lies in a strategy of non-violence.

Qashqavi said Tehran believes that San’a’ can find its way out of the current crisis by adopting an approach that focuses on the rights of the Yemeni people.

Since 2004, Yemeni government forces and Zaidi Shia fighters have been engaged in a periodic war in northern parts of the country.

On August 11, a fresh round of fighting broke out after a year of relative peace, as the Yemeni army launched new attacks on Sa’dah, and Amran provinces.

San’a’ claims that the Houthi, fighters are trying to restore the Zaidi imamate system, which was overthrown in a 1962 coup.

The Houthis, however, say that they are defending their people and fighting for their civil rights. Zaidi Shias, the clear majority in the north, make up around 40 percent of Yemen’s overall population.

According to UN figures, the continued unrest in the past month has displaced around 50,000 more people, bringing the total count to 150,000 since 2004.

This is while international aid groups warn that the deteriorating humanitarian situation in northern Yemen has led to the displacement of another 35,000 people in just the past few days.

Based on figures released by the UN Children’s Fund (UNICEF), the unrest has directly affected almost 75,000 children as well.