The death toll from the twin terror attacks in Spain has risen to 14.

A woman died in hospital on Friday, hours after being injured when a car carrying five men wearing fake suicide belts ploughed into pedestrians in Cambrils, a coastal town 70 miles south west of Barcelona, local police said.

The attack, in which the five terrorists were shot dead by police, followed Thursday's atrocity in Barcelona's central tourist spot of Las Ramblas, in which 13 people were killed.

The Foreign Office said a "small number" of Britons had been injured and extra staff were being sent to Barcelona to help.

The Catalan directorate of civil protection tweeted: "A woman injured yesterday in Cambrils attack has died.

"Fourteen citizens died yesterday in Barcelona and Cambrils terrorist attacks."

A police officer was among seven people hurt in the incident in Cambrils and several controlled blasts were carried out in the area in the wake of the attacks.

In a chilling echo of the London Bridge attack in June, Catalonia president Carles Puigdemont said the five terrorists in the vehicle were wearing fake suicide belts when they were stopped, and linked them to the earlier Barcelona attack.

Three people are in custody in connection with Barcelona but a manhunt is also under way for Moussa Oukabir, 18, El Pais said.

The newspaper reported he is the teenage brother of Driss Oukabir, one of the men already detained.