The spokesman, Caley Gray, said Lautenberg was conscious when he was taken to an area hospital. He said he did not know if the 86-year-old senator fell in the apartment, or if he suffered any serious injuries.

Gray initially said Lautenberg was taken to the hospital as a precaution, and no further details were immediately available.

Lautenberg returned Friday night from a whirlwind 11-hour trip to Haiti with a congressional delegation that included House Speaker Nancy Pelosi.