It began with blips on a radar screen, 12 miles off the Libyan coast. As the rescuers approached, they found overloaded wooden vessels and rafts that evoked scenes of the slave trade.
The passengers — from Eritrea, Ethiopia, Somalia, Nigeria and other sub-Saharan countries — were found by the rescue boat Astral on Tuesday, part of a wave of more than 11,000 rescued in the Mediterranean by aid groups and the Italian Coast Guard this week.
One large wooden boat may have held 1,000 people, roughly five times its capacity.
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