Russia, Iran, China, and North Korea have increased their cooperation with one another but not to the extent the United States does with its own allies, according to the director of national intelligence, Avril Haines.

Those U.S. adversaries are “not acting as a block,” Haines said during an event with the Council on Foreign Relations on Thursday, adding, “We don’t see them as a four-part alliance or something along those lines. What we are seeing, without question, is increased cooperation on a bilateral and sometimes trilateral level.”