Pittsburgh is having a ninja problem.

From Gawker:

The greater Pittsburgh area has been contending with a very annoying ninja infestation lately. If you've ever had a ninja problem yourself, you know that they're really hard to get rid of, and if you see one, you can be sure there's hundreds more where he came from.

The most recent outbreak occurred when a sword-wielding ninja was spotted breaking into eleven cars by a man named Santino Guzzo. When Guzzo confronted him, the ninja "tried to stab him." Guzzo was packing heat, however, and drew his gun. That sent the ninja running off into the cover of darkness, yet he still somehow managed to "break the rear window of Guzzo's car as he ran off."

[...] Less than two weeks prior, Ross Hurst, a resident of Scottdale (less than hour south of Pittsburgh), had left his four-year-old son sleeping alone at home — when police picked him up at 1:30 am allegedly "pretending to be a ninja."