Jerusalem (CNN) -- Israel fired two rockets into southern Gaza on Saturday night, injuring one person, according to the Israel Defense Forces.
The airstrikes were in response to the firing of a Qassam rocket from Gaza, which landed in Sdot Negev Regional Council on Saturday morning, the IDF said.
A local security official in Gaza told CNN that one of the Israeli rockets hit an abandoned underground tunnel near the Egyptian border, injuring one person. The second rocket hit an open area in southern Gaza. No injuries were reported from the second strike.
The IDF said it was targeting two "terror-linked sites."
"The IDF holds the Hamas terrorist organization solely responsible for maintaining the calm in Gaza ... and for any terrorist activity emanating from it," the IDF said in a statement, adding that it "will also continue to respond harshly to any attempt to use terror against the State of Israel."
CNN's Talal Abu-Rahma contributed to this report.