Earlier on Tuesday, a rocket fired from Gaza damaged a home in the southern Israeli town of Sderot.
The rocket caused no injury and there was no claim of responsibility.
It was the first rocket to strike inside an Israeli town in several weeks.
Most of Tuesday's air raids apparently targeted smuggling tunnels beneath the Gaza-Egypt border, near the town of Rafah.
Israeli warplanes frequently target the tunnels, saying that fighters use the tunnels to smuggle arms into the Hamas-governed territory.
With Israel and Egypt enforcing a tight blockade on Gaza, smugglers also use the tunnels to bring in food, medicine and even livestock.