CARACAS, Venezuela — After several days of student-led protests against his government, President Nicolás Maduro said Sunday that he was expelling three American consular officials who he said had been visiting universities here.

He did not say exactly what the officials had done to deserve expulsion, nor did he identify them, saying they had claimed to be visiting private universities to offer visas to students.

Mr. Maduro, a socialist who was elected in April, has often said the United States is seeking to oust him from office; Sunday was the third time in less than a year that he has announced the expulsion of American officials.

Mr. Maduro kicked out the American chargé d’affaires and two other embassy officials in September. In March, on the same day that he announced the death of his predecessor, Hugo Chávez, Mr. Maduro expelled two American military attachés. In both those cases he said the officials had been conspiring against the government, charges that Washington denied.