As if weeds, ball marks, and bunkers weren't enough for groundskeepers at a Norwegian golf course to worry about.

For the past 10 years, the crew at Stavanger Golf Club has had to clean human poop and used toilet paper from holes all over the course.

Groundskeepers say the poop bandit used to arrive on bicycle, and always strikes on weeknights.

"In the early morning dew we observed bicycle tracks on the course. Footsteps showed that he had done his business, and the bicycle tracks disappeared back the way they came," managing director Steinar Floisvik said, according to a UPI report.

The course installed high-powered spotlights, but the bandit just climbed a tree next to the lights, wriggled out on a branch and dismantled them, the news agency reports.

"How he managed the feat without electrocuting himself or falling is a riddle," groundskeeper Frode Jormeland said.

Course officials figure the bandit either has a strange fetish, psychological problems, or just really hates golf.