The initial probe suggests the involvement of the security guard who was accompanying the truck, said police.
The truck was on its way to Chennai from Haryana, when the incident occurred.
Pramod Verma, Inspector-General of Police of
"The container was on its way from Gurugram in Haryana to Chennai. The guard called some of his associates and overpowered the driver," he added.
Investigation into the matter is underway and more details are awaited.