Aruban firefighters began draining a lake in the search for 18-year-old Natalee Holloway Tuesday.
A police spokesman says the draining of the lake across from the Marriott Hotel is part of the investigation into the Mountain Brook, Ala., teen's disappearance.
A jailed Dutch youth, 17-year-old Joran van der Sloot, has said he was with Holloway in the area the night she disappeared.
Holloway's stepfather, George Twitty, said two new witnesses had come forward.
Twitty says one witness claims he saw van der Sloot driving to a nightclub across the road from the Marriott Hotel around 2:30 a.m. the night Holloway vanished. He said van der Sloot tried to hide his face with his hands as he drove to the Racquet Club with Surinamese brothers Satish and Deepak Kalpoe. The brothers were detained as suspects and later released.
A second new witness told a private investigator hired by Holloway's family that she also saw the three drive into the Racquet Club three times that night.
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