Two Palestinians were wounded early Saturday morning, medical sources in the Gaza Strip said, as Israel launched airstrikes at training camps in the enclave.
A spokesman for Gaza's medical and emergency services said two civilians, aged 40 and 25, were injured when an Israeli fighter jet attacked a training camp for Hamas's military wing, the Ezzedine al-Qassam Brigades, northwest of Gaza city.
A separate air-raid targeted a training camp of Al Ahrar, a small movement close to Hamas. There were no casualties in that attack.
A statement from the Israeli army confirmed that its "aircraft targeted two terror activity sites in the northern Gaza Strip. Direct hits were confirmed." "The sites were targeted in response to the continuous rocket fire towards southern Israel," noted the statement.
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The sorties come less than a day after a rocket fired from the Gaza Strip early Friday struck a house in southern Israel, damaging its roof and leaving one woman requiring treatment for shock.
Another rocket struck in the Ashkelon region on Friday morning without causing casualties or damage.
A Salafist group claimed responsibility for firing the two rockets. They were the latest in a string of rockets fired from Gaza in the past week to have been claimed by the hardline Islamists.
Despite an informal truce between Hamas and Israel, tensions flare periodically on the Gaza-Israel border, with Palestinian militants firing rockets into the Jewish state and the Israeli military launching retaliatory air strikes on the Palestinian territory.
The last major flare-up was in June, when militants fired more than 150 rockets at southern Israel, wounding five people, and Israel hit back with air strikes which killed 15 Palestinians.