Earlier the day, Israeli artillery bombed with missiles a location to the east of Khan Younes, in the southern Gaza Strip, and destroyed it.
Sources in Gaza said Hamas and Palestinian Islamic Jihad officials who were in Cairo on Saturday night informed their Egyptian intelligence contacts that they have "no interest in an escalation with Israel", according to Israeli media.
In total, the IDF attacked six targets belonging to Hamas.
"We hold Hamas responsible for all aggression from Gaza", Conricus added.
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Police said the third had rocket hit a structure in a community near Gaza, causing damage but no casualties.
"Hamas will continue to resist and the Israeli attacks won't break our people's determination", he said.
Ashraf al-Qedra, the Gaza health ministry spokesman, told reporters that two Palestinians were injured in an Israeli tank shelling on eastern Rafah town in southern Gaza.
There are also fears of a looming humanitarian crisis in Gaza amid a stifling decade-long Israeli-Egyptian blockade of the coastal enclave and a stalled attempt to reconcile rival Palestinian factions Hamas and Fatah.
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Israeli fighter jets raided Hamas targets in the Gaza Strip after four soldiers were injured in an explosion on the border with the Palestinian enclave.
The Israeli army responds automatically to any strikes on its territory, generally targeting Hamas facilities.
Hamas and Israel have fought three wars since 2008, and the last conflict in 2014 was waged in part over tunnels from Gaza that were used to launch attacks.
Tensions between the Palestinians and Israel have been high since US President Donald Trump recognized Jerusalem as the capital of the Jewish state in December.
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