After the two leaders first met and embraced on the tarmac in Asmara, the Eritrean capital, last year, they reopened embassies, resumed flights and held a series of meetings across the region.
Thousands of protesters who had camped outside the army headquarters in central Khartoum for weeks were dispersed in an operation which left dozens dead.
Khartoum residents have mostly remained indoors over the past few days and the downtown business district was largely shut on Sunday.
