The passengers were identified as Saifullah and Ilyas, who have been moved to a nearby police station where they are being investigated.
Both of them reportedly belonged to Kohat. The vehicle was en route to Peshawar from Lahore when it was stopped by the police.
According to the police, thousands of rounds of bullets and weapons were recovered from the vehicle.
Earlier, police in Dera Ismail Khan recovered a suicide vest during a search operation, while officials in Peshawar claimed to have foiled a bid to smuggle arms into Punjab.
At least 15 kgs of explosives were packed into the vest, which was later defused. Meanwhile, the Peshawar police claimed to have foiled a bid to smuggle of arms into Punjab. Two people have been arrested in this connection.
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