A Palestinian health official said two Palestinians have been killed Thursday in the collapse of a smuggling tunnel under the Gaza-Egypt border.
Health Ministry official Moawiya Hassanain said that five people were pulled out of the tunnel alive.
Local residents say the tunnel was used for smuggling drugs and fuel into Gaza.
Gaza has been virtually sealed off from the world since the Islamic militant Hamas seized control by force a year ago.
Tunnels under Gaza's border with Egypt are used to bring in a range of items, from weapons to medicine, cement and clothing.