(CNN) A doctor, a teenager and another man were killed on Thursday in ongoing anti-government protests in Sudan, according to the Sudan Doctors' Union and activists.

The demonstrations first began over fuel shortages and a hike in food prices but have now morphed into full-fledged protests calling for President Omar al-Bashir to step down. The authoritarian Bashir has ruled Sudan with an iron grip for 30 years.

Thursday's deaths occurred during unrest in the Bahri neighborhood in the north of the capital, Khartoum.

The doctor, Abdel Hamid, died after being shot in the head "while resuscitating other protesters," according to the Sudan Doctors' Union and another protester on the scene who witnessed his death. The witness has asked CNN not to disclose her name for safety reasons.

The Sudan Doctors' Union said a "child" called Mohammed Obeid also died in the protests after being shot in the head. The same eyewitness told CNN she knows the younger victim's family and that he was only 14 years old.

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