(AP) — Police in Topeka say a woman reported missing from a nursing home was rescued more than 15 hours later from mud along the Kansas River.

Police were uncertain how long the woman — described as in her 70s — was stuck along the river before she was found around 9 a.m. Monday.

The nursing home reported the woman missing about 3:30 p.m. Sunday after she failed to return from church services. Police were trying to find out how she wound up along the south bank of the Kansas River, where a passer-by spotted her from a bridge Monday morning.

Emergency crews pulled her from the mud and took her to a hospital for treatment. Authorities said the woman uses a walker.