Two rockets were fired overnight into southern Israel from the Gaza Strip, the Israeli army said on Sunday.
One of the rockets activated sirens in the Israeli coastal town of Ashdod, 64 kilometres north of the Gaza Strip.
There were no immediate reports of any damage or wounded.
"Israel's Iron Dome defence system launched interceptors in accordance with standard operating procedures," the army said.
The Israeli Defence Force has responded to the attacks, according to a statement published on social media.
The Hamas strike comes days after the anniversary of the assassination of senior Islamic Jihad leader Baha Abu Al Ata, who was killed in a strike on his home in Gaza City on November 12 last year.