Rescuers said on Sunday that dozens of migrants had drowned off the coasts of Tunisia and Turkey, while hundreds had been rescued off Spain, as the flow of people seeking to get to Europe continued despite tightened controls.

At least 46 migrants died when their boat sank off Tunisia’s coast, the country’s Defense Ministry said on Sunday. The Coast Guard rescued 67 others, and the operation was continuing, the ministry said in a statement.

The migrants were of Tunisian and other nationalities, according to the ministry. Security officials said the boat had been packed with about 180 migrants, including around 80 from other African countries.