BURLINGTON (CBS) – A woman from Burlington who had been missing for more than a day was found safe overnight in a swamp.

Tanya Condon-Frieden, 45, had not been seen by family or friends since 5 p.m. Wednesday, when she was last spotted on Ivy Lane in Burlington near the Billerica line.

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Police and K-9 units spent hours searching the woods near her home.

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They found her around midnight over the Billerica border. She was taken to the hospital and is said to be in good health.

“It was a good outcome for us. We had a lot of help from surrounding agencies as well as the NEMLEC (Northeastern Massachusetts Law Enforcement Council) K-9 unit who ultimately was responsible for finding her. We’re very, very, very appreciative,” said Burlington Police Sgt.Dan Hanafin.

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Police are still trying to figure out how Condon-Frieden ended up in the woods.