SANTIAGO, Chile, Aug. 13 —A power cut brought a total blackout here as President Salvador Allende Gossens was in the middle of a nationwide address on the country's political crisis.

There were reports that Valparaiso, Chile's second city, and other areas of the country were blacked out. The electricity went off at 10:15 P.M., 35 minutes after President Allende had begun to speak, citing long list of recent acts of terrorism and sabotage that he attributed to “fascist opposition.”

[He went back on the air, The Associated Press reported, as power was beginning to be restored in some areas, and said that the blackout could have been either “a technically explicable failure or a fascist attack.” The news agency said that unidentified saboteurs blew up an electric‐power transmission line outside the city, attributing the information to Fernando Figueroa, general manager of the state power system.]

Before the power cut, Presi dent Allende warned that hp would call on Congress to declare a state of siege if calm was not rapidly restored in the nation.