Israel's military said it struck Hamas positions Sunday morning following a rocket attack from the Gaza Strip overnight.
Two rockets were fired into southern Israel from the Gaza Strip late Saturday, the Israeli army said, although there were no immediate reports of any damage or wounded.
The Israeli Defense Forces (IDF) tweeted they had "struck Hamas underground infrastructure & military posts in Gaza."
"The IDF is conducting an ongoing situational assessment & remains prepared to operate against any terror activity," they added.
An army source told AFP in a WhatsApp message that fighter jets, helicopters and tanks were deployed.
Security sources in Gaza said there were a number of strikes overnight, including in Khan Younes, Rafah and Beit Hanoun, without reporting any casualties.
Earlier Israeli media had reported the rockets from Gaza came down in uninhabited areas, although a military spokeswoman was unable to confirm this.