Problem with invading vine

[bigbobh]

I have some green seedless vines I planted and also some that sprung up on another part of property and both of these grapevines have been invaded with another vine with very similar leaves but entirely different fruit. Looks something like a blueberry but I dont dare taste them. Does anyone have any information as to what this intruding vine would be? I can furnish pix.
Thanks in advance for any advice .
Bob H

bigbobh

 

[jamesngalveston]

how bout a few pics...that would be helpful.

 

[grapeman]

I wouldn't even guess by that description without pictures.

 

[bigbobh]

how bout a few pics...that would be helpful.

Here are some pix