An Israeli reservist who served three tours of duty in Gaza has told Sky News in a rare on-camera interview that his unit was often ordered to shoot anyone entering areas soldiers defined as no-go zones, regardless of whether they posed a threat, a practice he says left civilians dead where they fell.

“We have a territory that we are in, and the commands are: everyone that comes inside needs to die,” he said. “If they’re inside, they’re dangerous you need to kill them. No matter who it is,” he said.

Speaking anonymously, the soldier said troops killed civilians arbitrarily. The soldier said the criteria of opening fire on civilians shifted depending on the commander.

The soldier is a reservist in the Israel Defence Force’s 252nd Division. He was posted twice to the Netzarim corridor; a narrow strip of land cut through central Gaza early in the war, running from the sea to the Israeli border. It was designed to split the territory and allow Israeli forces to have greater control from inside the Strip.

He said that when his unit was stationed on the edge of a civilian area, soldiers slept in a house belonging to displaced Palestinians and marked an invisible boundary around it that defined a no-go zone for Gazans.

“In one of the houses that we had been in, we had the big territory. This was the closest to the citizens’ neighbourhood, with people inside. And there’s an imaginary line that they tell us all the Gazan people know it, and that they know they are not allowed to pass it,” he said. “But how can they know?”

People who crossed into this area were most often shot, he said.