The John B. Kelly Elementary School in Germantown will remain closed to staff and students on Monday as it deals with a mold problem, according to School District of Philadelphia officials.

The mold, described as a "facilities issue" by the district, was discovered last week in several classrooms due to heating, ventilation, and air-conditioning issues and condensation damage, officials said. News reports said the mold had spread throughout walls and pipes in several classrooms.

The school district issued a statement Sunday that the school was in the final stages of cleanup. The statement said Kelly staff would continue to report to the Hill Freedman World Academy at 1100 Mount Pleasant St.

Mold has been found in schools in South Jersey, too. In Monroe Township four elementary schools were closed for at least a week earlier this month due to mold problems.