According to The Nation, lethal weapons including AK-47 rifles and spy gadgets were recovered from their possession at a check post near Sherpao Bridge.
Sources said that security personnel intercepted a suspected vehicle near Sherpao Bridge in which four foreigners were sitting.
The sources further revealed that the suspects started arguing with the law-enforcing agency officials.
When the arrested agents failed to produce necessary documents and the purpose of entering into the most sensitive area in the city, they were arrested and taken to an unidentified location for further interrogation.
Following their arrest, the law-enforcement agencies have been put on high alert across the provincial metropolis and armed patrolling had been intensified.