Hamas forces on shore traded fire with Israeli naval boats off Gaza's southern coast Tuesday, and an Israeli missile landed in nearby Egyptian territory, Hamas said.
During the exchange of fire south of the town of Rafah, an Israeli Apache helicopter fired two missiles at the Hamas forces in a security post, Hamas said. One missed a car and the second struck inside Egypt, it said.
There were no immediate reports of casualties.
The Israeli army spokesman could not immediately say what was happening in the area. There was no immediate reaction from Egypt.
Israeli forces frequently conduct operations in the Gaza Strip to thwart rocket fire from the volatile area, which the Islamic militant Hamas took over in June.