MONROE, Wis. (AP) — Health officials are investigating two recently confirmed cases of E. coli in children in a southern Wisconsin school district.

WISC-TV reports the cases were in children who attend Abe Lincoln Elementary School in Monroe.

Officials don't know if the new cases are related to a previous cluster of E. coli cases that happened in August and early September in Green County.

The Wisconsin State Lab of Hygiene is testing to determine the genetic strain of the recent cases.

The Monroe School District has informed students and parents of the recent cases. Abe Lincoln Elementary has started additional daily cleaning procedures to help prevent the spread of viruses or bacteria.

Symptoms of E. coli infection include diarrhea and severe abdominal cramps.