What has irritated American officials was that the Soviet Embassy on 16th Street in downtown Washington also carries out similar interceptions of radio and phone conversations but has not been subject to the countermeasures because of concern for Americans working in the area.

The beaming of radiation against the embassy in Moscow was known only to a few American officials until last February when Ambassador Walter J. Stoessel Jr. briefed his staff on the situation. News of the briefing was leaked to the press.

The briefing was held because State Department medical officers feared that the radiation might pose a health hazard over the long run, either to the eyes or to the genetic or nervous system.

I Officials have stressed that there was as yet no evidence that the microwaves had been responsible for any illnesses, (past or present.

Microwaves are unlike X‐rays and are not ionized. X‐rays in excessive amounts can cause cancer, but no connection has been made between microwaves and cancer.

The decision to release information on the embassy situation came after news reports that two young children of em bassy employees had been sent to the United States for examination of unusual blood samples; one has since returned to Moscow.

Mr. Funsten said the discussions with the Russians were aimed at ending the microwave signals.

“Frankly, we regret that the Soviets have failed to turn off the transmissions completely, and thereby, in our judgment, demonstrating a lack of concern for the living and working conditions of our people in Moscow,” he said.