Brasalia: Brazil is preparing to deal with a terrorist attack at the Rio Olympics but has no information of any planned plots, the country's intelligence chief said on Friday.

"We have no information about a terrorist cell preparing in Brazil. Our risk assessment does not indicate this, but we are working permanently as if the threat were imminent, as if this could happen tomorrow," Wilson Trezza, director of the Brazilian Intelligence Agency, said.

Fears have risen since the attacks two weeks ago in Paris.