The only border crossing for goods between Israel and the Gaza Strip was partially closed on Tuesday following a weekend of rocket fire and air strikes.
Gas and fuel will be stopped at Kerem Shalom until next Sunday, Israeli Defence Minister Avigdor Lieberman said, although food and essential medical supplies will be allowed through.
He also announced a tighter naval blockade around the territory in the Mediterranean Sea.
Saturday saw some of the fiercest clashes seen in the region since the 2014 war, with Israel using air strikes and its Iron Dome defence system to respond to rockets fired from Gaza at communities in southern Israel.
