The Bulgarian driver of a truck transporting arms was detained in Hungary, local media say.
The man was arrested after a customs inspection of the vehicle in the district of Bacs-Kuskun.
Customs officers say a "significant" amount of arms were found inside the German-plated truck.
Pretrial proceedings were launched into the development.
A harbor planned to be constructed for roll-on, roll-off (Ro-Ro) vessels in western Istanbul, aiming to carry up to 3,500 carrier trucks per day, will have negative urban and environmental impacts, the head of a civil organization dealing with urban affairs in Istanbul's Beylikdüzü district has told the Radikal news website.
A truck carrying agricultural workers collided with a milk tanker in the Aegean province of Manisa early on July 6, killing 15 passengers and wounding two.
The truck was carrying a group of mostly female agricultural workers to a vineyard to pick fresh grape leaves. Thirteen women who were heading to the grape field are among the dead.