Published: Nov 29, 2013 6:51 PM EST

LEHIGH ACRES, Fla.- Lee County deputies are investigating the 20th report of a BB gun shooting in Lehigh Acres.

This time, it happened on W. 7th Street. A homeowner found several BB gun impact marks on the window of his camper.

There have been 19 other similar cases in the last two weeks. And usually, it's during the overnight hours, so the damage goes unnoticed until the next morning.

In some cases, repairs have cost owners upwards of $500.

So far, no arrests have been made.