Israeli warplanes on Saturday night bombed and destroyed a tunnel that had been dug from a building in northern Gaza under the security fence that separates the Hamas-ruled territory from southern Israel.
Army officials said the tunnel, which was nearly one mile long, was to be used by Palestinian terrorists to infiltrate southern Israel and carry out an attack against civilians or soldiers there.
They also said the strike was a response to a Palestinian rocket attack on a southern Israel town on Saturday morning. There were no injuries in that attack.
In related news, bombs were set off at two Hamas security facilities in Gaza City on Sunday morning.
Israel denied involvement in the bombings, and media outlets pointed to any one of several Hamas rivals as the culprits. Hamas is regularly engaged by Palestinian groups loyal to Palestinian Authority leader Mahmoud Abbas and his Fatah movement, as well as small Islamist groups aligned with Al Qaeda.