A medical organization had on Wednesday said, a pregnant woman was murdered and several other people wounded when fighting erupted among troops near the site of a mass protest in Sudan's capital, Khartoum.

In a statement by the Central Committee of Sudanese Doctors (CCSD), troops had fired shots at themselves for unknown reasons near the army headquarters where thousands of protesters have been staging a mass sit-in for several months.

The shooting came on the second day of a 48-hour nationwide strike, in which medics, lawyers, civil servants and airline personnel are observing, aimed at pressuring the transitional military council to make way for a civilian government.

Omar al-Bashir, who governed Sudan for decades, was overthrown and apprehended in a military coup in April after months of anti-government protests.

But protesters say the new military rulers are a continuation of al-Bashir's erstwhile regime and have sought for more modifications.