It was just as they were about to leave the market when the explosion happened, according to a police officer from Kharadar.
Officials at the hospital acknowledged that they had received a woman's body and ten others who had been injured.
Residents in the area speculated that an explosive device mounted to a two-wheeler may have been the cause of the incident.
Sharjeel Memon, Sindh Information Minister, claimed earlier that police contingents had been despatched to the site while speaking to the media. At this point, police force arrived. Meanwhile, he promised to keep the public informed as soon as he learned more, but he declined to comment on the nature of the blast.