The only people to people contacts tolerated in Cuba are those officially sanctioned by and controlled by the Castro dictatorship.
We just learned via @AntunezCuba on Twitter, other opposition sources, and mutual friend Betsy Gonzalez, that Cecilia Rojas, an American citizen was arrested today in the town of Placetas. According to various sources she was in Placetas visiting Jorge Luis Pérez Antúnez and the opponent Luis Enrique Santos,(cell 52731656) currently on a hunger strike over the loss of his home. She was taken to a police station and her Florida driver's license was confiscated.
Joan Antoni Guerrero Vall reports on his blog Punto Cuba, that that Rojas had traveled to Cuba due to the recent death of her mother. More of that story in Spanish at Punta Cuba.