European Council President Donald Tusk congratulates Theresa May on her reappointment as British prime minister and urges her to start talks as soon as possible on Britain's exit from the EU to minimise disruption.

World leaders express dismay, sadness and solidarity with France over Nice attack that killed at least 80 people.

The president of the European Council says the only alternative to the EU is "political chaos" and labelled Boris Johnson's recent comments "absurd".

Last month's EU-Turkey deal on tackling the migrant flow has begun to produce results, a top EU official says.

Splits within the EU on the relocation of 120,000 migrants are further exposed as leaders gather for an emergency meeting in Brussels.