AIMTC president Kultaran Singh Atwal asserted 8,000 trucks were stranded at the major city borders including Kondli and Faridabad.
All truck unions, owners and drivers of trucks are advised to make adequate arrangements at their own level for proper parking and halting of their vehicles outside Delhi borders.
The probe covers Ram 2500, 3500, 4500 and 5500 heavy-duty trucks with 6.7-liter Cummins turbodiesel engines.
Sources said that there have been frequent clashes between the two truckers' associations over transport of iron ore.
The seized vehicles and machines have been handed over to Sadar tehsildar for initiating necessary legal action.
Cashing in on the Covid pandemic situation, private transporters have reportedly increased charges for transportation of goods, including that of essential commodities.
The official said the department is also coordinating with the police and district administration to ensure that the vehicles carrying the king of fruits are not stopped at the check-posts.
The two-day nation-wide token strike by truckers in support of their various demands has halted movement of goods across Karnataka.
Around five lakh trucks went off roads in Tamil Nadu pressing for various demands including a revision of GST rates.