President Obama will meet with European leaders in Brussels Thursday to discuss the volatile and fast-changing crisis in Ukraine. 

Obama will meet with leaders from both Britain and France to discuss the situation in Ukraine as well as Russia's involvement in the crisis. 

Obama will speak with British Prime Minister David Cameron in Brussels after meeting with a group of world leaders at the G7 summit, then he will fly to Paris to dine with French President Francois Hollande, The Associated Press reported. 

Both the United States and the European Union levied sanctions against Russia and Russian President Vladimir Putin for the annexation of the Crimean peninsula in March. However, Western powers are not showing the same solidarity since European leaders are planning private meetings with Putin while Obama is not. 

Western powers punished Putin for his actions in Ukraine by moving the G7 summit from Sochi, Russia, to Brussels after the annexation of Crimea. Russia has also been left out of the G7 for the first time in 17 years because of the country's recent actions. 

Western leaders released a joint statement condemning Russia's actions after a dinner Wednesday night, saying they believe Russia's actions violate Ukraine's autonomy. 

President Obama said earlier Wednesday that Russia will face an increase in sanctions if the country does not comply with Ukrainian and Western demands. 

"Our free nations will stand united so that further Russian provocations will only mean more isolation and costs for Russia," Obama said.

Obama also announced that he will ask Congress for up to $1 billion to increase the number of U.S. troops in Europe and allocate $5 million in equipment to aid Ukraine's military in fighting pro-Russia militants in the east Ukraine. The U.S. will provide the military with tools such as night vision goggles, communication tools and body armor. 

European leaders will discuss how to respond to the evolving dynamics in the conflict-ridden country. European allies were doubtful about the success of Ukraine's presidential elections on May 25, but the election of pro-Western chocolate mogul Petro Poroshenko has made Western leaders more optimistic about the country's future. 

Obama met with Poroshenko in Poland earlier this week and had nothing but adulation for the president-elect, who will be inaugurated Saturday. 

Ben Rhodes, Obama's foreign policy adviser, said the G7 leaders will discuss the possibility of levying more sanctions against Russia during the meeting. 

"We'll have to evaluate going forward, what are the triggers for different types of sanctions," Rhodes told The Associated Press. "That would be reviewing whether or not Russia is continuing to destabilize Eastern Ukraine and whether or not Russia is continuing to support separatist groups."

Ukraine has accused Russia of aiding pro-Russia rebels in the east, who have had violent clashes with government forces for more than two months. Russia denies helping the separatists but has urged the Ukrainian government to halt military force in eastern regions like Donetsk and Luhansk. 

The leaders will also discuss the global economy, international development issues and the effects of climate change and how to prevent it. 

Obama, Putin and Poroshenko are scheduled to be in Normandy Friday for the 70th anniversary of D-Day. However, it is not clear if Poroshenko and Putin will meet. 

Yet, Putin will meet with Cameron, Hollande and German Chancellor Angela Merkel Friday. 

Rhodes stressed that European nations must enter into talks with the Kiev government in order to initiate a peace plan. 

"We don't want different countries to be having conversations over the head of the government in Kiev about Ukraine's future," Rhodes said. "The question is not whether there are meetings; it's what people are saying in those meetings."