Islamabad, April 15 -- Sudan's main protest group has called on its supporters to "protect your revolution" after armed forces loyal to the country's ruling military council unsuccessfully tried to remove roadblocks put in place around a sit-in being held outside the defence ministry in the capital, Khartoum.

The Sudanese Professionals Association (SPA) urged protesters to continue the now 10-day-long demonstration outside the sprawling complex in a bid to heighten pressure on the military council and force it hand over power to a civilian government.

"We urge all the people to go immediately to the army headquarters to stop attempts to disperse protesters," the SPA said in a statement.

Thousands of activists remained camped outside t...