Hamas claimed responsibility for the first suicide bombing in Israel in more than a year, and said the attackers came from the West Bank and not — as initially speculated — Gaza, as Israel killed eight Hamas militants in Gaza on Feb. 5.

The latest round of Hamas-Israel fighting followed two weeks of anarchy on the Gaza-Egypt border. The growing violence suggested that Gaza's Hamas rulers are increasingly lashing out not just at Israel, but also at Egypt, as they are running out of options for ending a seven-month blockade of the territory.