The Israeli Air Force fired, on Sunday at night, missiles into a building in Beit Lahia town, in the northern part of the Gaza Strip.
Media sources in Gaza said the attack led to excessive property damage but did not lead to casualties.
The army said it targeted an observation post run by the al-Qassam Brigades, the armed wing of Hamas, and claimed it was retaliating to flammable balloons, which were reportedly launched from Gaza, causing no injuries.
Israeli media sources said two fires broke out due to the flammable balloons and alleged that some of them carried explosives.
Earlier Sunday, the army fired several artillery shells into Palestinian farmlands, and a site believed to be run by an armed resistance group, east of Deir al-Balah, in central Gaza.