NEW BRITAIN - Police say the massive security scare and lockdown at Central Connecticut State University was all caused by a Halloween costume.

Police say 21-year-old David Kyem was wearing a costume on campus that including a plastic sword and a handgun.

The costume was enough to frighten some students who called 911.

Residents say it was tough watching the lockdown on TV, but not knowing what was happening.

Police say Kyem has been charged with breach of peace.