Ukrainian Troops Killed Despite Renewed Commitment to Cease-fire Deal

Ukraine's military says more of its soldiers have been killed in the past two days by mortar and rocket fire from Russian-backed separatists. The fighting has intensified in eastern Ukraine despite the Minsk cease-fire deal signed in February. Both sides agreed Monday to pull more heavy weapons back from the front line, but as Henry Ridgwell reports from London, there are fears that the peace deal is becoming increasingly fragile.