Police seized a total of 3,700 opium poppy plants in the region of Viotia in central Greece Tuesday and arrested four foreign nationals – three Indians, aged 36, 47 and 58, and a 28-year-old Pakistani.
Authorities are also looking for a 64-year-old Greek man.
Three of those arrested did not have residence permits.
According to police, the plantation was situated next to a warehouse owned by the 64-year-old in the region of Thiva.
The four men were to appear before a prosecutor in Thiva on charges of illegally cultivating opium poppies.