Egypt says it is closing the Rafah border crossing with Gaza, the only land opening to the rest of the world for Palestinians living in the besieged strip. A spokesman for the Palestinian resistance movement, Hamas, says Cairo has informed Gaza authorities about shutting down the crossing from Monday. Security sources in Egypt confirmed the move, saying it would be closed until further notice, without offering details or reasons. Egypt had ordered the Rafah crossing to open in May to allow Gazans wounded in Israeli attacks to be treated and to deliver aid. The Egyptian decision to close the border point comes after a weekend of violence between Israel and Palestinians in eastern Gaza. Rafah is a lifeline for Gazans who have been under a crippling Israeli siege since 2007.