SYDNEY (Reuters) – Australian police said on Thursday a 48-year-old man was arrested as part of an investigation into suspicious packages sent to embassies and consulates across the country.

More than a dozen foreign offices received suspicious packages on Wednesday. Police have so far recovered 29 of the parcels but are yet to determine the exact composition of the material in them.

The man has been charged with sending dangerous articles through a postal service and the maximum penalty for the offense is 10 years imprisonment, the police said in a statement.