Jang Song Thaek was dismissed for unspecified "criminal acts," state media reported.
The State Department said South Korea was “planning to adjust” its zone.
Vice President Biden applauded the news as a “bright piece of sunshine.”
A bipartisan group of senators asked China to back off its territorial claims in the Pacific.
"Obama's decision to rebalance to the Pacific Basin is not in question,” Biden said.
“He is a very important man. Seriously he is important,” Biden told Li.
Biden said he was "very direct about our firm position" with China's president.
Official approval of the pact by Afghan Defense Minister Bismillah Khan Mohammadi or other members of Karzai's Cabinet could "fulfill the kind of commitment we need" to proceed with postwar planning and operations, Defense Secretary Chuck Hagel said Wednesday.
But "whatever document [Kabul] agrees to ... who has the authority to sign on behalf of Afghanistan" and give the postwar pact the green light is still an open question, the Pentagon chief added.
The Defense Department is shuttering key supply lines in Pakistan, ordering a halt to all military shipments along those routes.
The decision was prompted by security concerns for military and civilian shipping firms moving along the routes, Pentagon spokesman Mark Wright told Reuters on Tuesday.
Vice President Joe Biden and Japanese Prime Minister Shinzo Abe agreed Tuesday that their two nations need to move forward this year toward completing an Asia-Pacific trade deal.
While each leader acknowledged the difficulty in melding priorities for the 12 nations involved in negotiations of the Trans-Pacific Partnership (TPP), they expressed optimism in finding solutions and reaching an agreement as scheduled by year's end.