German Chancellor Angela Merkel called on her European partners Sunday to find a common solution to the refugee crisis.
Merkel said in a television interview with broadcaster ARD that she is using all her power to find a European solution and to address the causes behind the migration, especially in Syria.
Merkel said she had no "plan B" for a national solution to the refugee crisis if Europe fails to reach an agreement with Turkey to slow the flow of refugees into Europe.
"I am very optimistic that the European path will be successful," she said, stressing it was not time to think about alternatives such as national border closures.
Merkel said keeping Europe united and demonstrating humanity were her top priorities and urged Germans to have patience.
"This is a very important phase in our history," she said.
A special migration summit is planned for March 7 between the European Union and Turkey - the last stop for many migrants before reaching Europe. The 28-country bloc expects steps from Ankara to curb the flows.
Europe has been struggling to deal with a migration surge that brought more than 1 million people to the continent in 2015. Many are asylum seekers fleeing the war in Syria, but economic migrants have also joined their ranks.