Explosions heard near south-eastern Ukrainian city
Explosions have been heard near the south-eastern Ukrainian city of Mariupol, a day after the government and rebels agreed a ceasefire.
The BBC says one of its correspondents in the city says intense blasts from the eastern edges have rippled across the city.
The Red Cross said aid trucks heading for the rebel-held city of Luhansk had turned back because of shelling.
Earlier, the Ukrainian and Russian presidents said the ceasefire in eastern Ukraine was largely holding.
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