Australia: The premier of New South Wales, Gladys Berejiklian, announces her resignation. On October 5 Dominic Perrottet is sworn in as premier.
Guinea: Mamady Doumbouya is sworn in as transitional president. On October 6 Mohamed Béavogui is appointed prime minister.
Mexico: Alfredo Ramírez Bedolla takes office as governor of Michoacán and Mauricio Kuri González as governor of Querétaro.
Nigeria: Former administrator of Cross River (1993-94) and Delta (1994-96) Ibrahim Kefas dies.
San Marino: Francesco Mussoni (Christian Democrat) and Giacomo Simoncini (We for the Republic) take office as captains-regent.
Congo (Kinshasa): Parliament approves a ninth 15-days extension of the state of siege in the provinces of Ituri and Nord-Kivu, followed by a tenth on October 15.
Qatar: In parliamentary elections (turnout 63.5%), 30 nonpartisan members are elected; the remaining 15 will be appointed by the emir.
São Tomé and Príncipe: Carlos Vila Nova takes office as president.
Moldova: In the second round of parliamentary elections in Gagauzia (turnout 37%), independents win 14 seats (for a total of 25 of the 35 seats) and the Electoral Bloc of Communists and Socialists 3 (for a total of 9).
Canada: Former premier of Nova Scotia (1990-91) Roger Stuart Bacon dies.
Ethiopia: Parliament reelects Abiy Ahmed as prime minister. On October 6 he nominates Abraham Belay as defense minister, while Demeke Mekonnen is to remain foreign minister and Ahmed Shide finance minister.
Italy: In presidential elections in Calabria held October 3-4, Roberto Occhiuto (centre-right) wins 54.5% of the vote, Amalia Cecilia Bruni (centre-left) 27.7%, and Luigi de Magistris (left) 16.2%. Turnout is 44.4%.
Japan: Fumio Kishida is elected prime minister, winning 311 votes in the lower house to 124 for Yukio Edano. The new cabinet is announced with Shunichi Suzuki as finance minister and Yasushi Kaneko as internal affairs minister; Foreign Minister Toshimitsu Motegi and Defense Minister Nobuo Kishi retain their posts.
Mexico: Samuel García Sepúlveda takes office as governor of Nuevo León.
Russia: Aleksey Russkikh is sworn in as governor of Ulyanovsk oblast.
Russia: The governors of Tambov oblast, Aleksandr Nikitin, and Vladimir oblast, Vladimir Sipyagin, resign. President Vladimir Putin appoints Maksim Yegorov as acting governor of Tambov and Aleksandr Avdeyev as acting governor of Vladimir.
Romania: Prime Minister Florin Cîtu's government is defeated in a no-confidence vote which is supported by 281 members of parliament (234 needed). On October 11 President Klaus Johannis asks Dacian Ciolos to form a government. On October 17 a cabinet is nominated including Dan Barna as foreign minister, Nicu Falcoi as defense minister, Alin Stoica as interior minister, and Dragos Pîslaru as finance minister.
Russia: Vladimir Sidorov is appointed prime minister of Mordovia.
Peru: Prime Minister Guido Bellido resigns. Mirtha Vásquez is sworn in as prime minister and her cabinet is announced including Luis Roberto Barranzuela Vite as interior minister, other key ministers remaining in place.
Australia: Frances Adamson is sworn in as governor of South Australia.
Morocco: The government of Prime Minister Aziz Akhannouch is appointed with Nadia Fettah Alaoui as finance minister; Nasser Bourita remains foreign minister and Abdelouafi Laftit interior minister.
Nepal: The cabinet is completed, with Minendra Rijal becoming defense minister.
Russia: Boris Dzhanayev is approved by the local parliament as prime minister of North Ossetia-Alania.
Austria: Chancellor Sebastian Kurz announces his resignation. He is to be replaced by Foreign Minister Alexander Schallenberg. On October 11 Michael Linhart is named as new foreign minister and he and Schallenberg are sworn in.
Czech Republic: In parliamentary elections held October 8-9, SPOLU (coalition of Civic Democratic Party, Christian and Democratic Union-Czechoslovak People's Party, and Tradition Responsibility Prosperity 09) wins 27.8% of the vote (71 of 200 seats), Action of Dissatisfied Citizens 2011 27.1% (72), Pirates and Mayors (coalition of Mayors and Independents and Pirate Party) 15.6% (37), and Freedom and Direct Democracy 9.6% (20). Turnout is 65.4%.
Iran: Former acting foreign minister (1979) and president (1980-81) Abolhassan Bani-Sadr dies.
Pakistan: Sardar Sikandar Hayat Khan, former prime minister (1985-90, 2001-06) and president (1991-96) of Azad Kashmir, dies.
Jordan: All ministers resign in preparation for a cabinet reshuffle. The key portfolios are not affected in the changes made on October 11.
Brazil: Former governor of Rio Grande do Norte (1979-83) Lavoisier Maia Sobrinho dies.
Estonia: Alar Karis is sworn in as president.
Tunisia: Najla Bouden Romdhane is sworn in as prime minister with a cabinet including Imed Memmich as defense minister, Taoufik Charfeddine as interior minister, and Sihem Boughdiri as finance minister; Othman Jerandi remains foreign minister.
Isle of Man: Parliament elects Alfred Cannan as chief minister. He receives 14 votes, defeating Alex Allinson (8 votes).
Kyrgyzstan: Akylbek Japarov is appointed acting chairman of the Cabinet of Ministers. He is also nominated for the substantive post, with a cabinet including Almaz Baketayev as finance minister, while the foreign, defense, and interior ministers retain their posts. On October 13 the government is approved by parliament, appointed, and sworn in.
Norway: Prime Minister Erna Solberg submits her resignation and King Harald V asks Jonas Gahr Støre to form a government. This takes office on October 14, with Anniken Huitfeldt as foreign minister, Odd Roger Enoksen as defense minister, and Trygve Slagsvold Vedum as finance minister.
Russia: President Vladimir Putin appoints Anatoly Seryshev as his plenipotentiary in Sibirsky federal district and Mikhail Yevrayev as acting governor of Yaroslavl oblast.
Cyprus: The North Cyprus government of Prime Minister Hamza Ersan Saner resigns.
Saint Helena: In parliamentary elections (turnout 60.2%), 12 nonpartisan members are elected. (The attorney general is an ex-officio but non-voting member.)
South Korea: Former prime minister (2015) Lee Wan Koo dies.
Russia: Acting incumbent Sergey Melikov is elected by the local parliament as head of the republic of Dagestan. He receives 82 votes, against 2 for Samir Abdulkhalikov and 2 for Kamil Davdiyev. The government of Prime Minister Abdulpatakh Amirkhanov resigns.
The Sudan: The chairman of the Sovereignty Council, Abdel Fattah Burhan, asks Prime Minister Abdalla Hamdok to dissolve his cabinet but he rejects that request.
Mexico: Evelyn Salgado Pineda takes office as governor of Guerrero.
Afghanistan: Former acting prime minister (1995-96) Ahmad Shah Ahmadzai dies.
Canada: In mayoral elections in Edmonton, Amarjeet Sohi is elected with 45.1% of the vote, while Mike Nickel wins 25.3% and Kim Krushell 17.2%. Turnout is 37.5%.
United States: Former secretary of state (2001-05) Colin Powell dies.
Qatar: The emir, Sheikh Tamim ibn Hamad Al Thani, appoints Ali ibn Ahmad al-Kuwari as finance minister.