Humanitarian groups are sounding the alarm over increasingly disastrous hunger levels in the besieged Gaza Strip, which has been on the brink of famine for weeks as aid trucks struggle to pass Israeli-imposed border inspections or travel amid intense fighting.

“What we’re witnessing in Gaza right now is the mass killing of children in slow motion,” Alexandra Saieh, head of humanitarian policy and advocacy at Save the Children International, said in an interview aired on Al Jazeera English. “There is almost no food left, and nothing is getting to them. And children are being starved while trucks of food are literally sitting just a few miles away, waiting to get in. And we know this is happening largely because of Israeli bombardment and restrictions.”