The medical charity Medecins Sans Frontieres (MSF) has ended its sea rescue operation aimed at reducing the number of migrants and asylum seekers killed while trying to cross the Mediterranean from north Africa to Europe, it said on Tuesday. MSF said its three ships had rescued more than 20,000 people in over 120 search and rescue operations during eight months at sea. The International Organisation for Migration (IOM) has said 3,771 people died in 2015 while trying to reach Europe by sea, making the year the deadliest on record for those seeking sanctuary from conflict and poverty. "Whilst we remain absolutely convinced of the importance of dedicated search and rescue in saving lives…