Up to 100 migrants died in the Mediterranean waters after the boat carrying them from Libya got shipwrecked, the UN High Commissioner for Refugees Flippo Grandi said. 

"More than 90 people have died in another Mediterranean tragedy. Europe has proven its ability to host 4 million refugees from Ukraine generously and effectively. It must now urgently consider how to apply this to other refugees and migrants knocking, in distress, at its doors," Grandi said on Twitter on Sunday.

Read more: Turkey: Two killed, 24 rescued in sinking migrant boat

The overcrowded boat carrying the migrants left Libya "many days ago," the Medecins Sans Frontieres aid group said on Twitter. 

"The commercial tanker Alegria 1 rescued the only 4 survivors early this morning. We know from our initial contact with Alegria 1 that the survivors reported being at sea for at least four days on a boat with nearly 100 people on board," MSF said on Twitter on Saturday.

Read more: Pope to Visit Eastern Mediterranean to Raise Migration Issue

Aid groups called for coordination centers in Rome and Malta to assign a safe place for surviving migrants. 

The Euro-Mediterranean Human Rights Monitor included in its annual report earlier this year that about 1,864 migrants died or disappeared in 2021 compared to 1,401 in 2020.

In recent years, the EU has been struggling with an ongoing migration crisis as people flee across the Mediterranean.

Read more: Tunisian coastguards rescue 48 migrants trying to reach Europe