US President Barack Obama spoke to his South Korean counterpart Lee Myung-bak. He renewed Washington's unshakeable support for the country in the wake of a North Korean missile attack that killed two marines. Obama told President Lee that the thoughts and prayers of the American people were with the loved ones of those who were killed or wounded in the attack.According to the White House, the President said North Korea must stop its provocative actions and fully abide by the terms of Armistice Agreement and its obligations under international law. He said such attacks will only lead to its further isolation. Obama also had a situation room meeting with his top national security advisers about the situation on the Korean peninsula.