Spain on Friday claimed progress on reversing an extraordinary migrant surge into its North African exclave of Ceuta, the latest flashpoint in the international debate over immigration. Spain's Interior Ministry estimates about 50,000 people crossed by land and sea from Morocco since Thursday, but the ministry said Friday that about 25,000 had gone back. Reuters saw evidence of that as hundreds returned to Morocco via border posts. The numbers remain in flux: Ceuta's local leader put the original figure of migrants higher, at up to 60,000. Roughly 40 people died while crossing, mostly by drowning.