Protests broke out in several Sudanese cities on Thursday in some of the most widespread disturbances since the unrest began on December 19.

The capital, Khartoum, witnessed pitched battles between police and demonstrators, witnesses said.

The Sudan Doctors' Committee, a group linked to the opposition, said a doctor and a child were killed by gunshot wounds to the head during the violence.

Al Jazeera's Hiba Morgan reports from Khartoum.

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