What triggered the mass migrant crossings into Ceuta?

An estimated 60,000 migrants from Morocco have crossed into Ceuta, with dozens dying during the journey.

Some 25,000 of the roughly 60,000 people who crossed illegally into Ceuta since the early hours of Friday have already been returned to Morocco.

Spain has deployed its military to Ceuta after thousands of migrants rushed the border with Morocco, leading to more than a dozen deaths, according to the Spanish News Agency EFE. CBS News' Aidan Stretch reports.

Spanish Prime Minister Pedro Sánchez on Friday planned to head to the country's north African enclave of Ceuta after thousands of illegal migrants crossed the frontier.

Thousands of migrants entered Ceuta by sea and through a breached fence, prompting emergency calls as local businesses shut amid fears of unrest.