Israeli airstrikes hit convoys leaving northern Gaza on Friday, killing dozens and wounding hundreds, Hamas said. BBC and CNN have determined the geolocation of the video that appeared after the massacre.

The UN estimates that tens of thousands of Palestinians have fled their homes in northern Gaza after Israel gave them a 24-hour warning on Friday to leave.

On Saturday evening, there were the first reports of an attack on a convoy of cars heading to the south of Gaza. Soon after, videos appeared showing the carnage at the scene.

BBC Verify confirmed that the strike took place on Salah al-Din Street, one of the two escape routes from northern Gaza.

The street was crowded all day as residents of northern Gaza left for the south following Israeli warnings to evacuate the area.

The footage shows at least 12 bodies, which has a strong emotional impact. And The Guardian published some of these images.

Most of the victims are women and children. The location of the shadows in the video suggests that it was taken around 5:30 p.m. local time.

The Palestinian Ministry of Health said 70 people died at the scene and blamed Israel for the attack.

And CNN has geolocated and authenticated five videos from the site of a powerful explosion on the way to the evacuation of the civilian population.

It is not known what caused the explosion, CNN notes.

The Israel Defense Forces says it is investigating the situation, but said its enemies are trying to prevent civilians from leaving the north.

More than a million Palestinians were advised to evacuate on Friday ahead of an imminent Israeli ground operation.

Israel said on Saturday it was giving civilians in northern Gaza several more hours to leave the territory, with the ultimatum ending at 4pm local time.

The Israeli military bombarded Gaza with airstrikes in response to an unprecedented attack by Hamas last week that killed more than 1,300 people.

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