A 38-year-old man has been arrested after handing himself in to police following a hit and run in which two cyclists were killed, Avon and Somerset police said.
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163,000 French and 143,000 German soldiers were killed in the 10-month battle in 1916.
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The fire broke out on Sunday morning at the home for 35 residents in Litochki, a village 25 miles north of Kiev.