Health officials are investigating after a group of students from Kingsway Regional High School in Woolwich Township attended a beach party in Sea Isle City on August 13.
In a letter sent home to parents this week, the school district's superintendent says it's believed that the students contracted the virus while at the beach party.
The superintendent says multiple students from the school have tested positive.
RELATED: New Jersey Governor Phil Murphy urges public to cooperate with contact tracers
NJ Gov. urges public to cooperate with contact tracers
The district is asking any student who may have attended the party to self-isolate for 14 days.
Parents are also asked to call the school to let them know if their child attended the party.
While school has not resumed yet, the district says students are currently taking part in multiple activities, camps, and athletic practices, risking transmitting the virus to others.
Kingsway is reopening schools on September 8 with a hybrid learning plan of in-person and virtual instruction.
RELATED: Connecticut residents on alert after 'serious' virus outbreak
RELATED: Cluster of COVID-19 cases may be linked to NJ party: Officials
Hundreds of nursing homes still aren't allowing visitation amid coronavirus pandemic
Hundreds of nursing homes still aren't allowing visitation
RELATED: New York, New Jersey, Connecticut out-of-state travelers quarantine list
MORE CORONAVIRUS COVID-19 COVERAGE
How coronavirus changed the New York region
Do you have coronavirus symptoms?
What's Open, What's Closed in the Tri-State area
Back to school information
COVID-19 Help, Information. Stimulus and Business Updates
UPDATES
New York City
New Jersey
Long Island
Westchester and Hudson Valley
Connecticut
abc7NY Phase Tracker: