One hundred people, whose DNA shows connections to a dead baby found abandoned in Bolton, "may be related" according to police.
Detective Inspector Aaron Duggan says officers will rank the matches according to their "proximity" to the town.
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Police were called after the plane was stuck at Manchester Airport for hours because of a light covering of snow, according to passengers.
Beware icy stretches on Saturday night. Evening showers fade and temperatures fall well below freezing
Turning cold and clear tonight with wintry showers easing. Beware icy stretches and fog patches