Eight people have been detained as part of the investigation, Today's Zaman reported.
The stops happened Friday in southern Adana province. Police seized thousands of rounds of ammunition, rifles and explosives. Turkish officials said they have become increasingly worried about arms smuggling to different factions in the long-running Syrian civil war.
Friday's raid was at least the second large-scale arms bust in Adana in recent months. In November, nearly 1,000 mortar shells and 10 launching pads, as well as a number of weapons bound for Syria, were seized there, Dogan News Agency reported.
In the most recent bust, officials declined to speculate who was to receive the weapons.