The militia has been subjecting girls to ideological courses and recruiting them into the ranks of its all-female battalion, Yemen's information minister warned.
The militia's violent attacks against residential areas have been driving families to flee their neighbourhoods for safer areas.
The militia's violations include killings, torture, detentions, looting of public and private property and the recruitment of child soldiers.
Many people with disabilities were forced to flee the violence without their crutches or wheelchairs, while others were left behind by their families.
Since 2015, the kingdom has funneled $16 billion in humanitarian aid into all regions of Yemen, with 'transparency and impartiality'.
The religious minority has faced systematic persecution under the Iran-backed militia and has raised concerns that this will escalate.
Birth registration ensures children born to Syrian parents in Lebanon will eventually be able to claim a Syrian identity card and benefits.
The camp, which lies near the country's southern border with Jordan, houses thousands of Syrians in dire living conditions.
The aid had been intended for delivery to families in the city of Taez in November 2018, but was detained at a checkpoint for many months.
Recent events have made it clear that Iran and the Houthis seek to prolong the conflict in Yemen to further their own goals, experts say.