CAIRO, Egypt — In a significant escalation of tensions in Yemen, Houthi forces, supported by Iran, stormed the offices of United Nations humanitarian agencies in Sanaa on Sunday, capturing multiple U.N. employees, officials reported. This incident follows the recent assassination of Houthi leadership by Israeli airstrikes, prompting the rebels to tighten security throughout the capital.

Abeer Etefa, a spokesperson for the World Food Program, confirmed to reporters that security personnel conducted early morning raids on the U.N. offices in the Houthi-controlled city. Initial reports indicate that at least one staff member was detained, while further communications with other employees were lost, suggesting that additional detentions occurred across other regions.

Etefa emphasized that the arbitrary detention of humanitarian workers is unacceptable and poses a serious threat to the provision of aid. UNICEF representatives echoed these concerns, mentioning that several of their staff members were also taken into custody and that the agency was seeking further details from the Houthis.

The raids mark a troubling continuation of a long-standing campaign against international organizations operating in Houthi-held territories. The rebels have routinely apprehended U.N. personnel and workers from various aid organizations, culminating in significant disruptions to humanitarian efforts. Earlier this year, the U.N. halted operations in Saada, northern Yemen, following the detention of eight staffers.

These dramatic developments occur in the wake of Israeli airstrikes that killed prominent Houthi government officials, including Prime Minister Ahmed al-Rahawi and several cabinet members. The strikes were a response to ongoing Houthi attacks against Israel, part of the larger conflict that has engulfed the region. The Houthis have increasingly positioned themselves in opposition to Israel, launching missile attacks that have drawn international scrutiny.

The strike on Thursday targeted officials during a routine meeting aimed at reviewing governmental activities, marking a critical loss for the Iran-aligned faction. Details of their fatalities were confirmed by various Houthi officials and relatives. The only senior figures known to have survived were Defense Minister Mohamed Nasser al-Attefi and the group’s influential interior minister, who was absent from that meeting.

The U.N. envoy for Yemen, Hans Grundberg, has expressed deep concern regarding escalating violence and the potential for Yemen to become a battleground in broader geopolitical conflicts. Grundberg urged both the Houthis and Israeli authorities to refrain from actions that might lead to further destabilization.

This latest round of violence comes after a marked increase in hostilities, including a Houthi missile launch toward Israel, which was deemed a significant advancement in their military capabilities. The organization’s leader, Abdul-Malik al-Houthi, has threatened to intensify military operations against Israel, underscoring the possibility of a protracted conflict that extends beyond Yemen’s borders.

Analysts warn that the situation is evolving rapidly, with both local and international implications. The humanitarian crisis within Yemen continues to worsen, exacerbated by ongoing clashes and the deterioration of security for international aid workers. Amid these tensions, the prospect for peace remains increasingly elusive, highlighting the urgent need for diplomatic interventions in the afflicted region.