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An 8-year-old boy was missing for over a week in Germany. Then someone heard whimpering from beneath a manhole cover.

Police say there are no signs of foul play in the case of an eight-year-old boy who was found in a rainwater sewer more than a week after going missing in northern Germany.

The boy, identified only as Joe, disappeared on June 17 in the town of Oldenburg. Search parties spent days looking for him in vain until somebody heard whimpering from beneath a manhole cover about 330 yards from the boy's home on June 25. Rescuers found the boy naked, chilled and dehydrated inside the sewer, but otherwise unharmed. His clothes were later found elsewhere in the sewer.

Missing eight-year-old from Oldenburg found alive
Police officers examine a storm drain on June 25, 2022, in Lower Saxony, Oldenburg. An eight-year-old boy from Oldenburg, who was missing for eight days, has been found alive in a storm drain.  Andre van Elten/picture alliance via Getty Images

In a statement Tuesday, Oldenburg police said that their investigation concluded the boy likely climbed into a drainage pipe near his home and then got lost inside the narrow tunnels. Witnesses who claimed to have seen the boy outside the tunnels or in the company of an adult were deemed to have been mistaken.

The boy, who remains in hospital, has not yet been questioned by officers, police said.

Police said the search included a "wide variety of police departments across the country" as well as fire brigades and "countless individual citizens who took part in the search for Joe."

"I am very impressed by the great commitment of the past few days," Oldenburg Police President Johann Kühme said in a statement. "I would like to thank all the main and volunteer forces and people who have done everything with empathy and a high personal effort - until late at night - to find the missing child."

Eight-year-old Joe discovered in storm drain after disappearance
Damian Bodde (r) and Marc Meyerholz prepare a robot for use on June 25, 2022, in Oldenburg, Germany. Eight days after his disappearance, eight-year-old Joe was discovered in a manhole in Oldenburg. Martin Remmers/picture alliance via Getty Images
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