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 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.

President Donald Trump redesignated the Yemeni Islamic terrorist group, Ansar Allah, also known as the Houthis, as a Foreign Terrorist Organization (FTO). He first designated the Houthis as an FTO during his first administration,

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.

Yemen's Houthis released 153 prisoners on Saturday with support from the International Committee of the Red Cross (ICRC), the ICRC said in a statement. The identities of the prisoners were not disclosed,