Authorities dug out stranded residents as heavy snow blanketed Eastern Europe today and people struggled with travel delays, power outages and subzero temperatures. <br/><br/>Homeless people and migrants were among those most at risk. The recent cold snap has now been blamed for at least 69 deaths, and seen the lowest temperatures for decades in some parts. Poland, the country hit hardest by the deep freeze, reported two more deaths today as havoc spread to many countries across the region.<br/>'<br/>Greece's navy sent a ship to the island of Lesbos to house some 500 refugees and migrants. Rights group Amnesty International urged the European Union and the Greek government to move migrants from the Greek islands to the mainland and launched an online petition.<br/>