HAMILTON, Canada The UN on Wednesday raised alarms about the worsening humanitarian situation in the Gaza Strip and warned the continued closure of all cargo crossings is severely disrupting aid deliveries. "Our humanitarian colleagues warns that the recent closure of all crossing points for cargo is undoing critical progress made in delivering vital, life-saving assistance to people in Gaza since the ceasefire took effect on 19 January," spokesperson Stephane Dujarric said at a news conference.