U.S. immigration authorities have detained and revoked the visa of a Turkish doctoral student at Tufts University near Boston who had voiced support for Palestinians in Israel's war in Gaza.

Israel has vowed to increase military pressure until the militants return the remaining 59 hostages — 24 of whom are believed to be alive. Israel has also demanded that Hamas disarm and send its leaders into exile. Hamas has said it will not release the remaining hostages without a lasting ceasefire and full Israeli withdrawal from Gaza.