A Boston Municipal Court judge today set $1 million cash bail for a homeless man who allegedly raped two women in the garage of a downtown hotel in a period of two weeks, Suffolk County District Attorney Daniel F. Conley announced today.

Judge Sally Kelly did not set the $2 million bail requested by Special Assistant District Attorney Dara Kesselheim, but did order him held without bail pending a hearing on whether he violated his open probation for a 2008 assault and battery conviction out of West Roxbury District Court.

“The hotel’s employees, visitors, and neighbors are safer today with this man off the streets,” Conley said. “The facts as we understand them in both cases are chilling.”

Kesselheim told the court of two attacks on women in the garage of the Radisson Hotel on Stuart Street, one at about 6:30 a.m. on April 19 and the other shortly before 3:00 this morning.

Kesselheim said Boston Police were dispatched to Massachusetts General Hospital after the first attack and spoke to the victim, who said she had just parked her car on the fifth floor of the hotel garage and was headed toward the elevator when she was approached by a man who asked for directions out of the hotel.

After the woman gave him directions, she noticed that he continued to follow her. She became fearful, Kesselheim said, and began to run. Her assailant at this point grabbed her from behind.

The woman screamed and the assailant struck her in the face. He picked her up from behind and threatened to throw her off the ledge, Kesselheim said, before demanding, “Do you have $100 or do you want to die?”

Rivera allegedly removed the woman’s pants and undergarments by force. When she screamed, Rivera allegedly covered her mouth and threatened to “harm her further” if she continued, Kesselheim said.

Rivera allegedly exposed himself and assaulted her sexually until a passerby saw what was happening and rushed to assist. When the assailant fled, the witness gave chase but lost him when he entered an elevator.

This morning’s attack took place on the second floor of the same garage, Kesselheim told the court. The victim ran from the scene and reported the attack to a Boston Police officer working a detail on Stuart Street.

The woman told investigators that she had been grabbed from behind by her assailant and dragged to a nearby stairwell. He allegedly struck her in the face, grabbed her jaw, and pulled her hair, making statements about “what he was going to do to her,” Kesselheim said.

The man allegedly threw her on the ground, removed her pants and underwear, and sexually assaulted her. The woman was able to escape and ran from the area, Kesselheim said, and was subsequently transported to New England Medical Center.

Kesselheim said that Boston Police assigned to the case were at New England Medical Center when they learned of a patient in the building who matched the description of the assailant in both cases. That man was soon identified as Rivera. He was never in the same room as the victim.

Rivera was taken into custody and transported to the Boston Municipal Court in a hospital gown.

“Goddamn, your honor,” he exclaimed upon hearing the judge’s bail order.

In addition to setting high bail, Kelly granted a motion by prosecutors to seal the two victims’ names and personal information from court papers. She ordered Rivera to return to court on June 1 with attorney Joseph T. Moore.