Justin Bieber's string of bad luck is continuing, as the pop singer is being investigated for shooting a Nerf gun dart at a Ottowa, Canada security guard while playing with his 3-year-old brother and 4-year-old sister. TMZ reveals that he woman filed a police report, claiming Bieber assaulted her at the concert hall.

After being hit with the dart, the woman allegedly ran up to Bieber's security guard to vent her frustration over the incident. Police are now taking the police report seriously, and are interviewing people at the facility.

Source: tmz.com