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Police are seeing high tech criminal rings with highly secured networks being infiltrated for personal gains. The conventional way of fighting crime with weapons are completely powerless to stop these cyber criminal activities.

Are there any mistakes?
Thanks.
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Hi N2G

Police are seeing high tech criminal rings with highly secured networks being infiltrated for personal gains. The criminal rings have the higly secured networks? Who is infiltraing them? Who is gaining?

The conventional way {I'd use "method"} of fighting crime with weapons {perhaps you mean fire-arms -- surely having cyber-sleuths gives law enforcement a different type of weapon.} is completely ineffectivepowerless to stop in stopping these cyber criminals activities.
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Police are seeing high tech criminal rings, with highly secured networks being infiltrated for personal gains.

I feel 'with' could be interpreted in two different ways: 1: the possession of whatever comes before it, in this case, criminal rings. 2. an example of the subject. I think the latter requires a comma.

To answer your questions. (The quote function is not working Emotion: sad )
The criminal rings have the higly secured networks? no. Criminal rights are infiltrating secured networks.

Who is infiltraing them? Criminals

Who is gaining? Criminals
Then say "high-tech criminal rings that are infiltrating highly securted networks. (No need to say "for personal gains." Why else would they be criminals?)
Thanks, GG. Is the following OK? I'm learning how to use with.

Police are seeing an increased in criminal activities, with a growing number of secured networks being infiltrated including ATM networks.
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