It appears death haunts these refugees at every turn.

First it was the cut-throat terrorists who threatened to slaughter them, causing them to flee from their homes.

They then sought refuge in a small town in Borno State, called Rann.

But in January this year, the Nigerian army fighter jets in hot pursuit of Boko Haram opened friendly fire on their camp for the .

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It was calamitous.

More than 200 people died and about another 150 seriously injured.

That was in January. Fast forward to August, the remaining refugees have a new but even a graver problem to deal with – hunger.

The start of the rainy season has cut off access to Rann, leaving the more than 60,000 people in that town to rely on limited food and drug supplies that were last delivered weeks ago, aid agencies say.

Trucks carrying aid are stuck outside the town, which rain has turned into an island, marooned by waterlogged and swampy roads, according to MSF's emergency coordinator, Dana Krause.

"We are discussing alternative methods like delivering aid by donkeys next week," she told the Thomson Reuters Foundation.

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"But we are anticipating a bad situation in terms of hunger and malnutrition levels ... it is very worrying," Krause added.

The situation has even been made worse by the increasing population of Rann, which according to International Committee of the Red Cross, has at least doubled since January as more people have been uprooted by Boko Haram, while others who had sought refuge in neighbouring Cameroon have also returned home.