Two students at Birmingham metropolitan area schools have tested positive for COVID-19, with one of pupils having their case confirmed by the CDC, according to school and elected officials.

Tarrant Elementary School parents were sent a letter from the school district Tuesday that a student “has a confirmed case of COVID-19” and that it is unknown when the student contracted the disease, Tarrant City Schools tweeted Wednesday:

COVID-19 Update: Please visit our website to read a letter from Dr. Mize regarding next steps and precautions. https://t.co/jmWnzekkjg — Tarrant City Schools (@TarrantCity) March 18, 2020

Also on Wednesday, Helena Mayor Mark Hall said a Helena High School student has tested positive and the case is awaiting confirmation from the CDC. The mayor said the student is self-isolating at home with their family and that he was told of the case by Shelby County Schools Superintendent Lewis Brooks.

Hall said letters went out to parents at all four schools in Helena and that each school will be "deep cleaned and sanitized before schools go back operational."

The announcements came as the Alabama Department of Health reported that there are 51 cases of the novel coronavirus in the state, including 25 in Jefferson County and 4 in Shelby County.