Huge locust swarms raise fears of food shortages in South Sudan

UN warns 25 million people could be affected as wartorn country is beset by fresh wave of insects

Swarms of desert locusts, which have been ravaging crops and grazing land across east Africa, have now crossed the border into South Sudan, a country already struggling from widespread hunger and years of civil war.

The UN has warned that an imminent second hatch of the insects could threaten the food security of 25 million people across the region.