France and Italy tightened checks on travelers arriving from Spain on Aug. 1 after as many as 60,000 migrants crossed from Morocco into the Spanish enclave of Ceuta, triggering a humanitarian and political crisis.

Thousands of migrants streamed across from Morocco into the tiny Spanish territory of Ceuta on Thursday.

Thousands of migrants entered Spain's North African enclave of Ceuta from Morocco Thursday, as local officials called for a national emergency and...