the north yesterday, according to israel, after it opened a safe passage on the main road south for a few hours. another window has opened today for them to take the same route. meanwhile, the un s human rights chief has accused both sides of committing war crimes. here s our middle east correspondent yolande knell with the latest. israel s vast military might on display once again. it says hamas has lost control of northern gaza and its troops are battling inside gaza city. this is a critical point in the war. and for the first time the bbc was given access behind israeli lines in gaza, escorted by soldiers. while the bbc had editorial control of the report, these pictures were cleared for use by the israeli military. amid huge disruption, officers showed what they said was a hamas weapons factory, set up below a family apartment. they insisted hamas, not israel, was responsible for civilian loss of life. we know intelligence. we know what we had. we know the targets that ar