( CNN ) -- Women at two Kansas colleges are on edge after warnings that the same man may have raped 13 women at the schools in the last eight years . Kansas Attorney General Steve Six says each victim has described her attacker in a similar way . The University of Kansas and Kansas State University have alerted students to possible danger for those who stay in town during spring break , which starts Monday . Thirteen rapes have happened during breaks in the school year in the last eight years near the colleges . Eight happened near Kansas State University in Manhattan . Five happened about 85 miles away , in Lawrence , where the University of Kansas is located . Investigators say the same person may be responsible for all 13 rapes . Students like Carly Wagner , a senior at Kansas State , are taking precautions . She said she and her roommates already make sure to look out for each other . `` None of us ever walk alone at night . We go pick each other up or make sure that there 's no case where you have to be alone at night , '' she told CNN affiliate WIBW . The Kansas attorney general , Steve Six , said Wednesday that similarities in the attacks lead investigators to believe they may be looking for the same person . Those similarities include `` the age of the victims , the location of the rapes in off-campus housing '' and `` the fact they occurred during breaks in the school session . '' In addition , each victim has described her attacker in a similar way . Investigators are looking for a white man in his twenties of average height and weight . He has also been reported to have covered his face during the attacks , Six said . The University of Kansas sent an e-mail to students Monday warning those staying on campus for spring break . `` If staying in Lawrence , students should take reasonable precautions , as some reported sexual assaults and other crimes have occurred during breaks , '' read the warning , which did not refer specifically to the past rapes . The University of Kansas also posted recommendations on its Web site , including checking locks on home and apartment doors , walking in groups and knowing the location of campus emergency buttons . The specific dangers during college breaks have been on the university 's radar for some time , says Jill Jess , a university spokeswoman . Before winter break , the university offered free self-defense classes to students as a result of the past attacks , she said . Kansas State warned its students , faculty and staff of the past attacks in an e-mail last month . It was the second e-mail that campus officials have sent out in recent years regarding the rapes . `` It 's scary to walk around campus or be on a college campus not knowing at night what goes on and who can be around , '' one student told CNN affiliate KTKA . The Kansas State Women 's Center has also been working diligently over the past year to make students aware of the rapes , said Mary Todd , the center director . She has worked with some of the victims and has learned from their accounts that there was often no sign of forced entry . This has led her to believe the attacker entered residences during the day , when a lot of students feel safe leaving doors unlocked . By emphasizing such details , she said , the center hopes students will keep their doors locked . The Women 's Center and a group called Wildcats Against Rape have distributed pamphlets at campus buildings as well as several off-campus locations . The attorney general 's office warned the entire community Wednesday . `` We encourage women to be safe , but we encourage everybody in the community to also look out , '' Six said . `` Look out for your friends , call if you see something suspicious and just be vigilant during the spring break time . ''
Police believe same person may be responsible for 13 murders . They took place near two college campuses in Kansas during spring break . The rapes began eight days ago , police say . Students at University of Kansas , Kansas , have been alerted .