Ukraine's Poroshenko says rebels have withdrawn significant amount of heavy weapons

U.S. President Barack Obama delivers remarks at the National League of Cities annual Congressional City Conference in Washington, March 9, 2015. REUTERS/Jonathan Ernst

KIEV (Reuters) - Ukrainian President Petro Poroshenko said on Monday pro-Russian rebels had withdrawn a significant amount of weaponry from the front-lines in eastern Ukraine in accordance with a three-week-old ceasefire deal.

Attacks have fallen significantly, but accusations of continued violence on both sides show the fragility of the peace accord agreed in Minsk last month, which calls for the withdrawal of heavy weapons from the frontline.