EVROS, Greece — A child drowned on Monday when a dinghy carrying 48 migrants capsized while trying to reach the Greek island of Lesbos from the Turkish coast, the Greek Coast Guard said.

It was the first confirmed death since Turkey declared late last week that it was ending its policy of blocking migrants trying to cross into Europe, saying it could no longer take in so many people fleeing the Syrian civil war.

Over the weekend, Greece accused the Turkish government of becoming “a smuggler itself,” and deployed major military forces to the long land and sea borders it shares with Turkey. The Greek government also said it would suspend asylum applications for a month and deport anyone arriving illegally.

Neither of those measures is allowed under European Union law, but Athens said it would request special dispensation, and the European Commission said it was studying the announcement. International protocols on the protection of refugees, of which Greece is a signatory, also ban such policies, although there can be exceptions under extreme conditions.