This alert gives notice to the residents of the 18th District (Near North) of two criminal sexual assaults and one attempt criminal sexual assault. In each crime the lone female was walking home in the early morning hours in the Lincoln Park area and was approached from behind by an unknown male. On August 9, 2015, and August 20, 2015 the offender grabbed the victim and assaulted her. On August 15, 2015 the lone female walking home was approached from behind and held by the offender. In this case, the victim was able to fight off her attacker. In two of attacks, which occurred on the August 15th and 20th, the victims were at the entryway of their respective residences. After each assault, the offender then fled on foot.