But it doesn't show any signs of stopping.
Since 2015, Europe has scrambled to cope with the arrival of around 1.5 million people by sea.
In an effort to stem this flow, many European countries have tightened their policies and borders. In 2016, the European Union forged a controversial "one in, one out" deal with Turkey to stop the tide of migrants and refugees fleeing to the continent from the Middle East. And, this year, Italy has adopted an aggressive approach to halting migration across the Mediterranean from North Africa, backing the Libyan coast guard's rescue efforts and cracking down on nongovernmental organizations (NGOs) operating off the country's coast.
With each new twist and turn, the number of arrivals has dropped. But new migrant routes keep cropping up. People seeking alternative passages have moved westward -- seen in the recent spike in migrants arriving in Spain from northern Morocco -- while others are turning in desperation to new destinations such as Yemen
that surfaced on social media in early August showed stunned sunbathers watching as a dinghy packed with dozens of African migrants landed on a Spanish beach -- the latest sign of an evolving crisis.
Here's what has been happening in the Mediterranean:
Why are NGOs suspending migrant search-and-rescue (SAR) operations in the Mediterranean?
Three aid groups operating in the Mediterranean -- Doctors Without Borders (MSF), Save the Children and Sea Eye -- suspended their rescue operations in August, citing security concerns after Libya blocked foreign vessels from a stretch of sea off its coast. The MSF said an increasingly "hostile environment" had made their efforts untenable, while Sea Eye alleged that the Libyan government had issued an "explicit threat
" against NGOs.
What is the Libyan coast guard doing?
Libya has extended its SAR zone into international waters, restricting access to humanitarian vessels. The Libyan navy, emboldened by its agreement with Italy, has recently fired warning shots
at humanitarian aid vessels patrolling in this area. Libyan Navy spokesman Brigadier Ayoub Qassem told CNN: "We are fed up with these organizations. They increased the number of immigrants and empowered smugglers. Meanwhile, they criticize us for not respecting human rights."