The Palestinian militants are believed to have seized as many as 100 hostages during their surprise attacks in Israel. The gunmen infiltrated Jewish communities near the border with Gaza, killing and seizing civilians and soldiers.
Social media images show women and children are among those seized and taken to Gaza by the Hamas gunmen.
Israel has launched a wave of attacks in the Gaza strip in retaliation with reports that hundreds of Palestinian civilians have been killed.
Lyse Doucet presents BBC News at Ten reporting by Jonathan Beale and Caroline Hawley.
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