Nearly two weeks after police began investigating spikes planted in the shallows of an urban Seattle lake, the mystery has been solved.
The culprit? The city's Parks Department.
The Parks Department says the spikes were placed in the lake more than 20 years ago to hold down plastic sheeting in an attempt to control water plants, The Seattle Times reported Tuesday.
The metal stakes originally had curved tops that rusted off, leaving sharp points.
Some park users feared sabotage after dozens of spikes were found in the popular swimming spot.
At the time, Parks spokeswoman Dewey Potter said she couldn't think of any reason for the spikes. She said she suspected someone was trying to hurt people.
Potter on Monday said, "I'm sorry it was us."
Police have closed their investigation.
