BAGHDAD, Dec. 19 — In a lengthy phone conversation on Tuesday, the former Iraqi electricity minister who escaped from a Baghdad jail on Sunday ridiculed American and Iraqi officials and said he fled because he did not trust the police and had received a tip that he would be assassinated within days.

The official, Aiham Alsammarae, who telephoned this reporter, said, without offering proof, that he was already outside Iraq after finagling his way aboard a flight at the Baghdad International Airport.

Incredulous Iraqi security and justice officials disputed parts of his account, saying that a figure as recognizable as Mr. Alsammarae could not possibly have slipped onto a flight when he was the subject of a manhunt.

Mr. Alsammarae, who holds dual American and Iraqi citizenship, scoffed at those assertions and said they were made by officials who spent too much time inside the protected Green Zone in central Baghdad and did not understand how the country really worked.