Beloit police report arresting a 15-year-old boy in a recent shots-fired incident.  A police department Facebook post says officers were dispatched to the 1300 block of Nelson Avenue a little after 9:00 p.m. last Thursday after several callers reported hearing gunshots.  No one was reported hurt.  A 15-year-old boy was taken into custody Tuesday for attempted homicide.  Police thank community members for their ongoing support and cooperation in working together to bring violent offenders to justice.