The Israeli military said it was responding to "incendiary balloons" launched into southern Israel from Gaza. It is the first flare-up since a ceasefire was agreed between Israel and Hamas after heavy fighting in May.
Israeli airstrikes targeted a training camp in the Gaza Strip early Wednesday morning, Hamas-affiliated Palestinian media reported.
No casualties have been reported so far. It is the first flare-up in violence since Israeli forces and Hamas militants agreed to a ceasefire on May 21 that ended 11 days of heavy fighting.
What did Israel say about the strikes?
The Israeli Defense Forces (IDF) confirmed the airstrikes in a statement, saying they targeted "Hamas military compounds" in response to incendiary balloons being flown into Israel from Gaza.
The military said the balloons caused 20 blazes in southern Israeli communities near the Gaza border.
IDF spokesperson Avichay Adraee tweeted a video of the airstrikes and said "facilities and meeting sites for terror operatives" in Gaza City and the southern town of Khan Younis were targeted.
The IDF said that it was "prepared for any scenario, including a resumption of hostilities, in the face of continuing terror activities from the Gaza Strip."