Merengue star Elvis Crespo is being investigated after a woman said she saw him performing a sex act on an airplane en route from Houston to Miami, according to Miami-Dade County police.

The Grammy winner was masturbating in view of other passengers on Thursday, prompting the plane's captain to radio the Miami International Airport's air traffic control tower, the police report said.

Officers interviewed Crespo upon his arrival but did not arrest him. No charges have been filed.

When asked by police at the airport about the accusation, the 37-year-old Puerto Rican singer said: "I don't recall doing that."

Because the incident took place over US air space, the FBI is also investigating. Messages left for the FBI office in Miami were not immediately returned.

According to the police report, 52-year-old Patricia Perea of Canyon Gate, Texas, told police she was sitting next to the singer of the hit song Suavemente. She said that about 15 minutes after the plane left Houston, Crespo covered himself with a blanket and began to masturbate, then exposed himself.

On March 16, Crespo married his manager, Maribel Vega, in Puerto Rico.

He was scheduled to fly to New York on Thursday to participate in commitments related to the city's Puerto Rican Day parade, which is usually in June.