The Israel Defense Forces (IDF) targeted Gaza City with airstrikes after fires were started in southern Israel due to Hamas-backed militants firing explosive balloons over the border.

Israel’s Air Force responded to arson attacks on Saturday after Hamas-backed militants launched explosive balloons into southern Israel, resulting in at least a pair of fires. According to the IDF, the retaliatory strikes targeted a compound in Gaza City used for weapon storage and military training purposes. Furthermore, it’s reported that a terror tunnel was also targeted.

The IDF holds Hamas responsible for any attacks coming from Gaza, and they stated on Saturday that “The IDF will continue to respond forcefully against Hamas’s terror attempts.”

Saturday evening’s strikes are the second series of retaliatory attacks by the IDF this week.