Coordinates 020 (top) 122(side).
There was one guy driving one tank away from me. I dont know how many were there at the begining. But people were shooting with them.
There were more than just these 2. I didnt know if i can drive one so i've made a screenshot. When i came back in the game zombie was eating me (i exited the game - didnt want to lose the backpack) >.<.