France revealed it will spend an extra 600 million euros ($641 million) next year to ramp up security after the Paris attacks.
Canada's freshly elected Prime Minister Justin Trudeau vowed to remain a "strong" partner in the fight against the Islamic State group.
Israeli Prime Minister Benjamin Netanyahu called for "a global solution" to terrorism in a phone call with Francois Hollande on Wednesday to express his solidarity after the Paris attacks.
Britain's government came under pressure to let 16 and 17 year-olds have the vote in a referendum on European Union membership after suffering a defeat in parliament.
European Commission chief Jean-Claude Juncker insisted that Britain would not leave the EU, as leaders prepare to discuss David Cameron's reform demands at a summit next month.
US President Barack Obama said he was optimistic an elusive deal to contain global warming could be forged at an upcoming crunch summit in Paris.
Seventy years after the trials of top Nazis began in Nuremberg, Germany is racing against time to prosecute the last Third Reich criminals to make up for decades of neglect.
Philippine President Benigno Aquino promised to be the "perfect host" to all leaders attending a regional summit, but a long and lonely red carpet welcome walk for China's Xi Jinping betrayed their nations' icy ties.
Turkish President Recep Tayyip Erdogan asked Prime MinisterAhmet Davutoglu to form a new government.
Israel criticised "appallingly impudent" remarks by Sweden's foreign minister for drawing a parallel between the Paris attacks and the Palestinian-Israeli conflict.
President Francois Hollande said France would step up the battle against the Islamic State (IS) group in Syria in the wake of Paris attacks he dubbed "acts of war".
CIA director John Brennan warned that the attacks in Paris were likely not a "one off event" and that he expects the Islamic State group has more operations in the pipeline.
Japan's economy slipped into recession for the second time since Prime Minister Shinzo Abe came to power nearly three years ago.
UN chief Ban Ki-moon will visit North Korea this week for a likely meeting with the nuclear-armed state's diplomatically reclusive leader
French warplanes pounded Islamic State's Syrian stronghold in retaliation for a wave of coordinated attacks claimed by the jihadists which left 129 people dead in Paris.
Former Polish leader and Nobel Peace Prize laureate Lech Walesa slammed plans by his country's incoming government to stop welcoming refugees.
German President Joachim Gauck said the world is confronted with a "new type of war" perpetrated by terrorists bent on killing those who refuse to follow their "barbaric ideology".
European Commission President Jean-Claude Juncker firmly defended Sunday the EU's hotly-contested plan to redistribute refugees across Europe despite calls by Poland to scrap the scheme after the deadly attacks in Paris.
Russian President Vladimir Putin and US President Barack Obama shook hands and chatted in a six-second encounter at a summit in Turkey, breaking the ice for the first time since Moscow launched its air campaign in Syria.
Multiple "terror" attacks in Paris increased the pressure on some 20 countries and organisations meeting in Vienna on Saturday to overcome deep divisions and help end Syria's horrific civil war.
- Great Britain
- Asia Pacific
- North Korea
- Ban Ki-moon