Greek police are examining accounts from 10 people who witnessed an attack on the U.S. Embassy in Athens early Friday, state-run NET TV said Saturday.

The U.S. Embassy in Athens was attacked early Friday by a rocket that exploded inside the modern glass-fronted building but caused no casualties in an attack police said was probably carried out by a domestic terror group.

Unknown persons fired an missile at the U.S. Embassy in Athens at 5:55 this morning. There were no casualties and minor damage. The Embassy and the Consulate General in Thessaloniki will be closed to the public today, Friday January 12. It will also be closed for a U.S. public holiday on Monday, January 15.