The Tupamaro movement engaged then in political kidnappings, "armed propaganda" and assassinations. Of particular note are the kidnapping of powerful bank manager Ulysses Pereira Reverbel [es] and of the British ambassador to Uruguay, Geoffrey Jackson, as well as the assassination of Dan Mitrione, a U.S. FBI agent that was also working for the CIA (via the Agency for International Development's Office of Public Safety), who the Tupamaros learned was advising the Uruguayan police in torture and other security work.[5][6]