JERUSALEM (AP) â Israeli warplanes struck a target in the southern Gaza Strip early Monday, the Israeli military announced, saying it was responding to the launches of incendiary balloons that caused at least three blazes in southern Israel. The military said it had struck a Hamas military base. It said the base was near civilian areas that included a school but gave no further details. There were no immediate reports of casualties. The airstrike came several hours after the incendiary balloons were launched into Israel by activists linked to Gaza's ruling Hamas militant group. Photos and video posted on social media showed them sending the balloons into Israel. On one of them was written the message: âTime is running out.â