Federal police and Western intelligence agencies have broken a spy ring that was supplying NATO secrets to the Soviet Union, a newspaper reported Friday.

The Cologne Express newspaper called it "a huge blow against the Soviet secret service," the KGB.A spokesman for the West Berlin Justice Department confirmed that "three people are being investigated on suspicion of espionage."

He said one was taken into custody for interrogation on Friday, and that a warrant is out for another. He refused to elaborate.

The Cologne newspaper said it learned from security sources that the "espionage ring had obtained strictly secret electronics of the Leopard II tank and important high-tech equipment such as micro-processors."

It said some of the equipment has "already been sent to the East."