Turkish customs officers seized 177 kilograms (390 pounds) of marijuana during an anti-narcotics operation at the Greek border, the country’s Trade Ministry said Thursday. 

In a written statement, the ministry said authorities found the drugs in a truck entering from Greece at the Ipsala border gate in the northwestern Edirne province.

With the help of a sniffer dog, customs enforcement squads uncovered the contraband in 320 packages hidden in the vehicle, it added.

An investigation has been launched into the incident.

* Writing by Gozde Bayar

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