WASHINGTON, Nov. (UPI)- A representative of the Cuban rebels charged today that the United States Ambassador to Cuba, Earl E. T. Smith, and two United States generals were “conniving to undermine” the State Department’s hands-off policy towards the Cuban civil war.

The accusation was made by Ernesto Betancourt, registered agent here for the 26th of July Movement, in a letter to Senator Wayne Morse, Democrat of Oregon. Mr. Morse is chairman of a Senate Foreign Relations subcommittee that plans to start a comprehensive study of United States- Latin American relations.

Señor Betancourt submitted a photographic copy of what purports to be an intercepted report from the Cuban military attaché here, Col. José D. Ferrer, to Brig. Gen. Francisco Tabernilla, Chief of Staff of the Cuban armed forces.