Austrian firefighters rescued an 81-year-old retiree who spent four days stuck in her tub after she got in for a warm bath and couldn't muster enough strength to get out, authorities said Monday.

Neighbors reported hearing faint knocking inside and authorities said they went to the woman's apartment in Linz, about 120 miles west of Vienna.

The woman was in surprisingly good condition despite having been immersed in bath water since last Thursday evening, firefighters told public broadcaster ORF. They said she told her rescuers she lacked the strength to get out of the tub and had knocked and shouted for help.

The woman was taken to a hospital for treatment of exposure, ORF said.

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