A syndicate of terror groups is working to sow violence and destruction across South Asia, and India and Pakistan need to work together to combat the mutual threat, U.S. Defense Secretary Robert Gates said Wednesday.

Gates, who spoke during a visit to India, said no nation was immune from terror.

He linked Taliban militants operating along the Pakistan-Afghanistan border with Lashkar-e-Taiba extremists accused of orchestrating the 2008 terror attack on the Indian city of Mumbai, saying both groups worked under the umbrella of Al Qaeda.

“It’s dangerous to single out any one of these groups and say, ‘If we can beat that group, that will solve the problem,’ because they are in effect a syndicate of terrorist operators intended to destabilize this entire region,” Gates said.

When one group succeeds in carrying out an attack, all of them gain in capability and reputation, he said. “A victory for one is a victory for all.”