Hello and welcome to News Air from the BBC World Service. We're coming to you live from London. I'm James Menendez.

And we're going to begin the program today in Gaza after another night of devastating Israeli airstrikes.

Hospital directors there have told the BBC at least 54 people were killed in two of the deadliest strikes.

One hit a school, sheltering displaced people in Gaza City, causing fires to sweep through

the makeshift dormitories. Many of the victims, some of them children were severely burned.

The other, airstrike hit a house in Jabalya, reportedly killing 19 people, including 17 from the same family.

Again, children are among the dead. Israel says it's hit 200 targets in just the past 48 hours

and is now threatening a new assault on Han Yunus in southern Gaza. In the case of the school,

it said militants had set up a command center on the premises,

something we can't verify, as the BBC, along with other international media, aren't allowed

into Gaza. Instead, we rely on Palestinian freelance journalists. Using their material,

Fergal Keen has been looking at the situation facing Gaza's most vulnerable, the babies and small children.

The... The endless loop of the Gaza sandcape.

It plays through the people's days and dreams.

Small scorched bodies are pulled from a burning home.

An Israeli airstrike killed nine children of Dr. Ala al-Najar and her husband Hamdi.

Their cousin Sama al-Najar described what happened.

The second bomb is very, very strong. More and more, more and more black around us.

There is no suns, there is no clouds. And we, even, we can't see the sky.

My uncle's wife, Dr. Al-Aamil Najar,

she's a doctor for children.

She treated children.

...