A Cuban exile accused of masterminding a dozen bombings in Havana last summer was plotting to assassinate Fidel Castro during the communist leader's visit to the Dominican Republic next week, The Miami Herald reported Sunday.

Citing unnamed Miami exiles and law enforcement sources, The Herald said three men met with Luis Posada Carriles in Guatemala City last month to discuss smuggling guns and explosives into Santo Domingo, where Castro is scheduled to visit next week.Cuban exiles in the Dominican capital had begun gathering information about Castro's movements and were preparing to house and transport a "hit team" that was to arrive at the last minute, the sources said.

The newspaper said an informant tipped off the FBI to the plot.

Last month, FBI agents searched a Miami River shipping complex after being told there were guns and explosives for anti-Castro activities hidden aboard a boat there.

Bomb-sniffing dogs found nothing but police seized a wooden boat with a new racing motor estimated to cost about $20,000.

The Herald said one owner of the docking facilities, Enrique Bassas, was one of the three militants identified by exiles as having met with Posada in Guatemala City.

Bassas, 50, is one of the founders of the Miami Medical Team, a group of exile medical personnel that aided anti-Communist guerrillas in Nicaragua and Angola in the 1980s. He refused to comment to The Herald and couldn't be reached for comment by The Associated Press Sunday.

Posada, 71, was identified in news reports last year as the mastermind of a dozen bombings in Havana last summer, one of which killed an Italian tourist.

Posada has lived in hiding since escaping from a Venezuelan jail in 1985 while awaiting trial in the bombing of a Cuban airliner in which 73 people died. He could not be reached for comment.