New Delhi, April 3 -- FBI agents have arrived in Cuba to investigate the fatal shooting of five men aboard a U.S.-flagged speedboat in February that the Cuban government said was carrying suspects who were trying to infiltrate the island.

Five other men on the boat were wounded in an exchange of fire with the Cuban Border Patrol on Feb. 25 in what the Cuban government has called a terrorist attack by Cuban expatriates who had been living in the United States. The U.S. government has disavowed any connection to the group, and said it wants to fully investigate Cuba's claims.

The FBI technical team arrived Tuesday to conduct a thorough and independent investigation, a U.S. diplomatic official who is close to the matter told The Associated...