At least 18 migrants died trying to reach the Spanish territory of Ceuta after tens of thousands of people breached the frontier with Morocco and poured into the tiny Spanish territory.

Most of the 60,000 migrants who entered the Spanish territory of Ceuta have since returned to Morocco. Among those who remain, many hold out of hope of reaching mainland Spain, across the Strait of Gibraltar.

Hundreds of migrants from Morocco have swum into the Spanish enclave of Ceuta over the last week.

AstraZeneca and Bristol Myers Squibb have held talks to create the world’s fourth biggest pharmaceutical company. A tie-up would forge a $400bn giant in the industry and would help expand AstraZeneca’s footprint in the United States.

Conservative leaders across Europe react as an estimated 60,000 migrants crossed into Ceuta from Morocco within 24 hours, threatening its open-border policies.

Most of the migrants returned to Morocco after as many as 60,000 overwhelmed the tiny Spanish territory of Ceuta.

The scale of the mass movement was compounded by three things: a ruling this month from Spain’s Supreme Court giving deportation protections to people who swim into the territory, widespread videos on social media of those making the journey and the apparent acquiescence of Moroccan border guards.

The Ceuta crossings have shaken Europe politically, exposing divisions over the sensitive issue of migration, the BBC's Sarah Rainsford writes.