Yemen’s Houthi rebels unilaterally freed 153 war detainees Saturday, the International Committee of the Red Cross said, one of several overtures in recent days to ease tensions after the ceasefire in the Israel-Hamas war in the Gaza Strip.

The United Nations on Friday suspended all travel into areas held by Yemen’s Houthi rebels after seven more of their staff were detained by the rebels.

The move will authorize harsher penalties on the Iran-backed group, which has attacked Israel and disrupted global shipping trade in the Red Sea for over a year.

The United Nations said on Friday that the Houthis who control northern Yemen had detained seven U.N. personnel, and it was suspending all UN staff movement in Houthi-held areas while seeking the detainees' immediate release.

Prisoner releases have been seen as a bid to jump-start talks to end Yemen's war, which began when Houthi rebels seized the capital, Sanaa, in 2014.

Yemen's Iranian-aligned Houthi rebels on Saturday released 153 war detainees in the militia-controlled capital Sana'a, according to the International Committee of the Red Cross (ICRC). "This operation has brought much-needed relief and joy to families who have been anxiously waiting for the return of their loved ones,

The United Nations (UN) says it has suspended all movement in Houthi-held areas of Yemen after a number of UN personnel were detained by the armed group in the capital, Sanaa. The UN said that it was actively engaging with senior Houthi officials to try to secure the release of all its detained employees.