The Israeli rocket attack struck military compounds and weapons productions facilities, the Israeli military reported. It came after three rockets were fired from Gaza at Israel, with only two crossing the border.
The Israel Defense Force said the attack was a response to Hamas sending burning, oil-soaked rags over the border, attached to kites or balloons. The incendiary devices caused 17 fires after they landed in Israeli territory on Monday, the environmental group Jewish National Fund said.
The attacks, in their fourth consecutive day, came at dawn and are accompanied by alarm sirens in Israeli communities near the Gaza border.
The Israeli government said the kite and balloon attacks have caused $2.5 million in property damage to farmland since they began earlier this month.
The IDF said one rocket fired into Gaza struck a car belonging to a group that launched the balloons into Israel.
"The IDF will act with growing determination against terrorist activities in all its different forms until they cease," the agency said in a statement.