A bomb exploded Tuesday at the Swiss embassy in Athens...

ATHENS (Reuters) - A bomb exploded Tuesday at the Swiss Embassy in Athens, causing no casualties, it was learned from police sources.

"A bomb exploded at the embassy in Athens, there was no warning," said a police official wishing anonymity.

A package exploded Monday at the headquarters of a courier company in Athens while the police bomb defused two other bombs concealed in packages, one of which was destined to French President Nicolas Sarkozy.