COLUMBIA, S.C. (AP) — A South Carolina grandfather is apologizing for picking up the wrong boy from an elementary school.

According to WIS-TV, an incident report in Orangeburg County says Joseph Fuller showed up at Edisto Primary School on May 19 and spotted a boy who he believed was his grandson. The report says the grandfather approached the boy and gave him a hug. When Fuller asked the boy if he was ready to go, the boy said yes.

The report says a teacher’s assistant told sheriff’s deputies that she asked the boy if the man was his grandfather, and the boy said yes.

It wasn’t until after Fuller brought him home that the mistake was realized and he returned the boy to the school. He says he’s very sorry.