LIMA, Peru — A Dutchman who has long been a suspect in the disappearance of an Alabama teenager in Aruba five years ago was arrested Thursday in connection with the murder of a young woman in Peru.

The woman, Stephany Flores, 21, was killed in a Lima hotel on Sunday, five years to the day after the Alabama teenager, Natalee Holloway [pictured], disappeared.

The suspect, Joran van der Sloot, was escorted by three police officers as he entered a police station in Santiago, Chile, on Thursday. He did not comment as he entered, walking calmly and without handcuffs as reporters shouted his name.

Mr. van der Sloot, 22, was detained while traveling in a taxi toward the Chilean coast, said Prefect Alfredo Espinosa, chief national spokesman for Chile’s investigative police.

The Chilean police are awaiting instructions from their counterparts in Peru, Mr. Espinosa said.

General César Guardia of the Lima police said that Ms. Flores, who had been seen with Mr. van der Sloot early Sunday, had been found on Wednesday lying facedown on the floor of his hotel room. Her neck had been broken, and she was fully clothed with no signs of having been sexually abused, he said.

Ms. Holloway disappeared on May 30, 2005, during a high school trip in Aruba, a Dutch island in the Caribbean where Mr. van der Sloot’s late father had been a prominent judge.

Prosecutors said that Mr. van der Sloot was still their main suspect in the case, even though he had not been charged.

Mr. van der Sloot was in Peru for a poker tournament and a video taken at a casino in Lima shows him with Ms. Flores early on Sunday, General Guardia said. The two were later seen entering the hotel by one of its employees around 5 a.m., and Mr. van der Sloot departed alone about four hours later, he said.