From the BBC:

The editor of Sudan's Citizen newspaper has told the BBC he will not comply with a government ban.

Nhial Bol said the order to stop publishing his paper was "political", and because the managing editor was from the war-torn Darfur region.

The Tribune has also had its licence revoked by the National Press Council, which denies the move is political.

Both papers are based in semi-autonomous South Sudan but are distributed nationally.

The BBC's Amber Henshaw in Khartoum says freedom of the press is supposed to be guaranteed by a 2005 peace deal between the north and southern-based rebels.

But she says editors often complain about censorship and print runs being stopped.

The security services check newspapers before publication, she says.

The National Press Council (NPC) says the papers were banned because they do not submit their papers for approval and are not based in Khartoum, as required by their registration.