A second medical evacuation flight carrying 24 critically ill Yemenis from Sanaa, the capital held by the Iran-backed Houthi militias, arrived in Jordan on Saturday, an AFP photographer said.

The plane was carrying men, women and children in dire need of medical treatment, along with their companions, a World Health Organization spokesperson said earlier.

The flight had been due to leave Sanaa on Friday but was rescheduled for "technical reasons," according to the WHO.

It reached Amman's Queen Alia airport at about 6:00 pm local time (1600 GMT).

A first "mercy flight" evacuated seven children from Sanaa on Monday for medical treatment in Jordan.

The United Nations is eager to build the necessary confidence between the warring parties in Yemen to enable more such evacuations.

The WHO said Friday it was "committed and working very hard to ensure these Yemeni patients receive the treatment they need."

The flights were launched through a humanitarian initiative by the Saudi-led Arab coalition.