FISHTOWN (WPVI) -- A school in the Fishtown section of Philadelphia has been locked down over concerns about a person with a gun in the area.26th district police officers responded to the Penn Treaty Middle School in Fishtown after 8 a.m. Thursday.The lockdown went into effect after a person with a gun was reported in the area of Montgomery Ave. and Moyer St.The school is located in the 600 block of East Thompson Street.Stay with Action News and 6abc.com for more information as it becomes available.----------