Ukrainian President Petro Poroshenko has said that "Crimea was, is, and will be Ukrainian" but stated he does not want war or revenge, during his inaugural speech.
He said: "I don't want war; I don't want revenge. I want peace and I want peace to happen," Poroshenko told parliament after taking the oath.
In his inaugural speech he said that he would offer a safe corridor for Russian fighters to go home and that he would "guarantee immunity to all."
He said: "Please, lay down the guns and I guarantee immunity to all those who don't have bloodshed on their hands."
More top news
New test could help doctors identify the signs of lung cancer up to five years before the disease shows up on traditional scans.
The Police Federation is pushing for a wider rollout of Tasers , and a new model, the X2, is awaiting Home Office approval.
Charity says social media is helping fuel a nation of 'deeply unhappy' children as figures show rise in number hospitalised over self-harm.