Who reacted to jay's treaty with england by beginning to capture american ships?

The French reacted to Jay's treaty with England by beginning to capture American ships. Not only they captured ships, they also withheld war supplies to America.

This was a treaty between the United States and Great Britain that averted war and resolved issues.  It marked the first use of negotiation as a means of settling an international dispute.  It also prepared a way for settlement of the long dispute with Spain.

secretly cooperate with one another.