Landline internet connections were down across Khartoum, creating a digital blackout in the Sudanese capital a week after mobile online services were largely cut following a deadly crackdown on protesters.
Internet lines from the country's main provider Sudatel stopped working in the early afternoon and the outage had affected embassies, luxury hotels and offices. The landline outage was also affecting cities and towns outside the capital.
The cuts come as a nationwide civil disobedience campaign entered its second day against the country's ruling generals who took power after the ouster of longtime leader Omar al-Bashir in April.
Protest organizers said the campaign would run until the generals handed power to a civilian government.
The campaign kicked off nearly a week after an assault on demonstrators at a sit-in outside the army headquarters in Khartoum left dozens dead and crushed hopes for a swift democratic transition.