Tensions between Sudan and South Sudan are threatening to develop into a full-scale war along the border between the two rival nations.
After weeks of increasingly angry verbal exchanges, South Sudan's army is sending reinforcements to the border.
In an exclusive report, Al Jazeera joined the troops on the frontline during a break in Khartoum’s bombing campaign.
Al Jazeera's Peter Greste reports from the Sudan-South Sudan border.
Source: Al Jazeera