SACO — Thornton Academy was locked down briefly this morning after a robbery at a nearby drugstore.

The school was told of the Rite Aid robbery, which did not involve a weapon, at about 8:30 a.m., and police asked the school to lock down as a precaution.

About 25 minutes later, Thornton Academy was told that there was no danger, the school said in a statement. Teachers went back to normal classroom instruction at that time, school officials said.

Information about the robbery has not yet been released by Saco police.