Peru on Tuesday declared a health emergency at its northern border as thousands of Venezuelans, fleeing economic crisis and hunger at home, continued to stream into the country despite tightening entry requirements.

In a decree published in the government's official gazette, Peruvian President Martin Vizcarra declared a 60-day emergency in two provinces on Peru's northern border, citing "imminent danger" to health and sanitation due to immigration. It did not give more details on the risks.

The exodus of Venezuelans to other South American countries is building toward a "crisis moment" comparable to events involving refugees in the Mediterranean, the United Nations said this week.