Connection between two bores

In my house I am getting sufficient water from my 600 ft bore. But my neighbour is not getting water from their bore (approximately 250 to300 ft). Now he is blaming us that our bore is sucking the water from their place. As per him, if we stop running our motor they will get the water. We are a joint family and also we have three elite restaurant. For restaurant we are taking water from our house only. What is your answer to this. Is there any connection between our bores? Please explain me.