A senior Nigerian police official, sent to the International Association of Chiefs of Police (IACP) conference, in Boston, United States was tossed out of the meting and reported to the US State Department after he was accused of fumbling a woman working at the convention centre, the Boston Herald reports last week.

The suspect, whose name was not released, because he was not arrested and questioned by Boston police sexual assault unit, after he allegedly committed the offence inside the Boston Convention and Event Centre in South Boston.

He was detained and questioned but was released after the victim declined to press charges.

A Boston Police spokeswoman, Elaine Driscoll, confirmed that the IACP credentials of a Nigerian policeman were revoked because the accusation, that a sex attack took place, were made against him.

"Allegations of sexual misconduct are a serious matter and we take the appropriate action when necessary," Driscoll said.

"The allegations prompted IACP officials to revoke the suspect's credentials, and Boston police investigators had contacted the State Department and the Nigerian Embassy," Driscoll said.

A witness to the alleged attack told the Herald that the suspect approached the woman, touched her, and said: "Hey, are you going to give me a place to stay this week?"

The woman responded that she had a fiancZ, according to the witness. Then he grabbed her burst and (buttocks), said the witness.

"She screamed. She was very upset, and he was surrounded by Boston police," said the witness.

The IACP conference, which featured a session on police medical care in Nigeria, was said to have ended without the officer's presence.