A mob of Kenyan men attacked and stripped a young woman claiming she was inappropriately dressed just hours after nearly 1,000 people marched through downtown Nairobi to protest at the rising wave of such assaults.
Police responded by arresting nearly 100 people.
Nairobi police criminal investigations chief Nicholas Kamwende said that about 80 of the men arrested were conductors on mini-buses, known as matatus, where much of the recent sexual harassment has taken place.
Kamwende called the attacks a "menace" and said police would increase their vigilance to stem the mobs' actions.
Gangs of men have attacked women wearing mini-skirts and any outfit they consider too revealing, including tight-fitting or sleeveless clothes.
Marchers on Monday demanded the right for women to dress however they want without being harassed or attacked.