A gunbattle involving an Egyptian border guard in southern Israel along the border left three Israeli soldiers and the Egyptian officer dead Saturday, officials said.
It was a rare instance of deadly violence along the frontier.
lt. Desert. Richard Hecht, an Israeli army spokesperson, said the fighting began overnight when soldiers thwarted a drug-smuggling attempt across the border.
Several hours later, two soldiers in a guard post were shot and killed. Their bodies were found after the shooting, when they did not respond to radio communications.
Hecht said the killings appeared to be connected to the thwarted drug smuggling attempt. The army said the Egyptian border guard was killed in a second exchange of fire in which a third Israeli soldier was killed.
The Egyptian military said an Egyptian border guard crossed the border security barrier and exchanged fire with Israeli forces while he was chasing drug traffickers. It said in a statement that the Egyptian border guard was killed along with three Israeli troops.
Hecht said an investigation was being conducted in full cooperation with the Egyptian army. He said troops were searching for other possible assailants.
It was the first deadly exchange of fire along the Israel-Egypt border in over a decade.
The Israeli army said one of the soldiers was a woman.