Israel has threatened to retaliate after two brothers were seriously injured in a rocket attack by Palestinian militants in Gaza.
Sderot comes under attack on an almost daily basis
The rocket, which landed in the town of Sderot, was one of around a dozen fired into southern Israel on Saturday.
During the day, Israeli planes attacked Palestinian positions thought to be used as rocket launch sites, wounding two people.
In another air strike, a Palestinian militant was killed.
The two Israeli brothers, aged eight and 19, were injured as a rocket landed yards away from where their family was running to seek shelter after warning sirens rang out to announce the attack, Israeli media reported.
"Israel will take resolute and decisive measures to protect our citizens," said Israeli government spokesman David Baker.
"We will not allow Israeli families to be victimized by Palestinian rockets in the heart of their own cities."
The town of Sderot is targeted by Palestinian rockets on an almost daily basis.