Israeli leaders have warned Hamas that it risks a major escalation in the Gaza Strip by failing to stop cross-border rocket and incendiary balloon attacks.
Defence Minister Benny Gantz said the Palestinian group, which controls Gaza, would "suffer a very severe blow".
However, a Hamas spokesman vowed it would "not hesitate to enter battle if Israel's attacks and siege continue".
Overnight, militants fired 12 rockets towards Israel and Israeli warplanes conducted three rounds of air strikes.
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