THORNDIKE — Vandals spray-painted offensive words and symbols, including a swastika, that were discovered Wednesday on the U.S. Post Office in Thorndike.

U.S. Postal Service officials, including Unity Postmaster Candace Raven, spent time Wednesday painting over the bright yellow graffiti on the white clapboard building on Mountain View Road.

Raven declined to speak about vandalism, directing questions to a regional spokesperson in Boston, who did not return a request Wednesday for comment.

“I’m not allowed to talk about the incident,” Raven said.

It was not clear Wednesday if the vandalism was a federal offense.

In addition to offensive language and the Nazi symbol, the words “Geeker Party,” “Ice Baby” and “TEHE” were painted on the building.

Patrons driving up to mail letters could be seen shaking their heads at the sight of the vandalism.

At the nearby Thorndike Town Office, Town Clerk Rose Hill said she and other residents were shocked by the vandalism.

“This is terrible for a small town to be exposed to this sort of thing,” Hill said. “It’s sad.”

Hill said the vandalism is an act of ignorance and could have serious consequences.

“If this is the work done by kids, they talk about it with others,” she said, “and I hope anyone with information about it calls the police.”

They need to know they could be in real trouble, Hill said, and the Nazi symbol could have a “hate crime consequence.”

“Kids can do stupid things,” she said.

Hill said she plans to post photographs and information on social media to possibly generate information on those responsible for the vandalism.

“This is so uncalled for,” she said.