It is not clear what happened next or whether the ADT staff member was injured, the Daily Mail reported.
It is also not clear whether the van in this incident was on patrol or was responding to an alarm call from a customer.
According to International Business Times ADT security guards are prime targets for hijacking by criminal gangs, as they often carry weapons, ammunition, and body armour.
Google confirmed it is looking into the incident and said it always cooperates with police when required in such cases, the Daily Mail reported.