A US teacher has been arrested after allegedly locking her Covid-positive son in a car boot to protect herself from exposure to the virus as she drove to a testing site, say local media.

Sarah Beam, 41, is reportedly charged with endangering a child.

The incident is said to have taken place earlier this week on Monday when Beem was taking her son to a drive-thru Covid testing center.

A witness called police after hearing someone in the vehicle’s trunk on 3 January at the site in Harris County, Texas, according to click2Houston.com.

According to reports, an official at the testing center heard voices coming from the trunk. When inquired, the teacher reportedly opened the boot, revealing the boy lying inside.

Ms. Beam said her 13-year-old son had tested positive for Covid-19 and she was taking him to the Pridgeon Stadium location for another test to confirm the result, according to local media.

She reportedly said she had placed the teenager in the car boot because she did not want to be infected herself.

In a statement, Cy-Fair ISD Police Department said, “CFPD was alerted that a child was in the trunk of a car at a drive-thru Covid-19 testing site earlier this week.

“Law enforcement conducted a full investigation, resulting in a warrant for arrest. Thankfully, the child was not harmed.”