The Harvard janitor accused of groping two students told police that he has attacked about 100 women over the last few months, prosecutors said at his bail hearing Jan. 27.

A judge ruled that Geremias Cruz Ramos, 27, would be released on $1,000 cash bail on the conditions that he surrender his passport and stay away from the Harvard campus.

As of last night, Ramos had surrendered his passport but still had not produced the $1,000 cash bail, a source close to the case said.

According to the source, the U.S. Citizenship and Immigration Services (USCIS) has a detainer on Ramos—if Ramos posts bail, USCIS can bring him to an immigration court before releasing him on personal recognizance.

Amy S. Otten, a spokesperson for the Immigration and Customs Enforcement (ICE) Office, said she would neither confirm nor deny that Ramos’ immigrant status was being investigated.

If Ramos were convicted of the gropings and found to be an illegal immigrant, he would serve his jail sentence first and then go to ICE “for removal,” Otten said.

Although Ramos has only been charged with two counts of indecent assault, a Cambridge Police Department (CPD) officer testified at the hearing last Tuesday that Ramos admitted to groping three to four women a week over the past five or six months.

“He said he felt good, felt accomplished, and [the assaults] made him happy,” Detective John F. Fulkerson said at the hearing.

Ramos is the only suspect who has been arrested in a string of six sexual assaults near Harvard Square this year.

Ramos was arraigned on Jan. 27 for indecent assault and battery in an incident that occurred on Jan. 13 near Claverly Hall, where he is accused of groping an undergraduate.

Ramos, a janitor at Stillman Infirmary in the Holyoke Center, had previously been charged with assaulting a graduate student on Jan. 20.

Cambridge police have said Ramos is not a suspect in the four earlier incidents because the suspect descriptions in those cases do not match Ramos’ profile.

University President Lawrence H. Summers said last Tuesday that Harvard was “gratified by the arrest” and said he had asked the General Counsel’s office to review procedures for background checks on Harvard employees.

Ramos is an employee of Sodhexo, a facilities management company that Harvard subcontracts to perform janitorial services.

Currently, Sodhexo performs background checks on non-management level employees only by request of the subcontractor, according to Merry Touborg, spokesperson for Harvard’s Office of Human Resources.