Residents claim insurgent group Al Shabaab sent gunmen into the streets to round up women who appeared to have a firm bust.
The women are inspected to see if their suspected firmness is natural or from a bra. Officials reportedly make the women shake their breasts after removing their bras.
"Al Shabaab forced us to wear their type of full veil and now they order us to shake our breasts," a resident, Halima, told Reuters, adding that her daughters had been whipped on Thursday.
The new bra rule adds to the long list of religious restrictions in Somalia, including a ban on movies, musical cell phone ring tones, dancing at weddings and playing soccer.