Venezuela’s top diplomat in Nairobi was killed at her home by three intruders over a power struggle at the embassy, the Kenyan police said Tuesday. Venezuela’s acting ambassador, Olga Fonseca Giménez, was found strangled in her bed on Friday morning. Her colleague, First Secretary Dwight Sagaray, who was arrested on Saturday and brought before the High Court on Monday, will soon be formally charged as the main suspect, the police said. Nicholas Kamwende, head of the criminal investigations department, said the motive was “jostling for positions in the embassy.” The police have issued an arrest warrant for a friend of Mr. Sagaray’s, and are looking for two other men in connection with the investigation.