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 / Updated  / Source: NBC News

About 400 migrants, including children, are feared drowned after a ship capsized during an attempt to reach Italy from Libya, a children's advocacy group said Tuesday.

Approximately 150 survivors were rescued from the shipwreck that occurred 24 hours after departing from the Libyan coast and were taken to Reggio Calabria, Italy, according to Save the Children.

The survivors told the agency that "many young boys, probably minors" were likely among the victims.

In the last three days alone, more than 5,100 migrants have landed in Italy, Save the Children Italy said in a statement.

"Many of them have lived experiences of atrocious violence, and have lost friends, relatives or parents, even in recent shipwrecks,” Valerio Neri, director of Save the Children Italy, said in the statement. "According to reports, the situation in Libya is getting out of control, with widespread violence in the streets."

Over the past few months, a record-setting number of migrants have attempted to reach Europe by way the Mediterranean Sea, fleeing war and hardship in Libya, Gaza, Syria and Egypt.

At least 22,000 people have died crossing the Mediterranean since 2000, according to the International Organization for Migration.

Migrants arrive at the Sicilian Porto Empedocle harbor, Italy, on April 13. Italy's Coast Guard helped save 144 migrants Monday from a capsized boat in the waters off Libya and spotted nine bodies. It was the most dramatic of numerous rescue operations that brought thousands to safety in recent days, as good weather has encouraged the desperate to set out on smugglers' vessels. The overturned boat was spotted 80 miles north of Libya, Coast Guard Cmdr. Filippo Marini told The Associated Press in a telephone interview.AP