In what is being termed as one of the biggest terror attacks in Spain since 2004, a van rammed into pedestrians in Las Ramblas in Barcelona on Thursday (17 August) evening, killing 13 people and injuring nearly 100 others. Police have launched a manhunt for the driver of the white Fiat van that jumped onto the pavement and sped down Las Ramblas, hitting tourists and residents of the historic Spanish district at around 4.50pm local time.

The death toll is likely to rise later in the day as more reports come in on the attack and the casualties. Police, for now, have revealed that the dead and injured included people from 24 different nationalities. Australia has already announced that four of their citizens were injured in the Barcelona attack.

Spain terror attack
Two young girls run to leave a cordoned off area after a van ploughed into the crowd, killing two persons and injuring several others on the Rambla in Barcelona on August 17, 2017 LLUIS GENE/AFP/Getty Images
Spain terror attack
A woman gestures as she is escorted out by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 PAU BARRENA/AFP/Getty Images

Police have said that two people have been arrested, one of whom has been identified as Driss Oukabir, a 28-year-old man originally from Morocco. He was born in the town of Aghbala, from where he moved to the French city of Marseille. Police have confirmed that neither of the two arrested was driving the van at the time of the attack. The driver is believed to have fled the scene on foot.

Hours after the attack, police in Cambrils, 100km from Barcelona, thwarted a "second terrorist attack" and killed five attackers. Four of them were shot dead at the spot, while the fifth was wounded in the gunfight and later died.

Spain terror attack
People are escorted by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 Getty Images

Police are yet to establish if the two attacks were related. Isis claimed responsibility for the first attack, saying through its Amaq News agency that the attack was carried out by its "soldiers".

Images from the attack sites showed people in horror and panic running to safety. Heavily armed security personnel were guarding the affected areas. People were asked to stay indoors until police operations concluded.

Spain terror attack
A woman cries as she and others are escorted by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 Getty Images
Spain terror attack
People leave a cordoned off area after a van ploughed into the crowd, killing one person and injuring several others on the Rambla in Barcelona on August 17, 2017 PAU BARRENA/AFP/Getty Images
Spain terror attack
A police officer helps evacuate people after a van crashed into pedestrians near the Las Ramblas avenue in central Barcelona, Spain August 17, 2017 Ana Jimenez/La Vanguardia/via Reuters
Spain terror attack
A woman cries as she and a man are escorted by Spanish policemen outside a cordoned off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 Getty Images
Spain terror attack
Policemen accompany clients of a store outside a cordoned off off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 Getty Images
Spain terror attack
Spanish policemen accompany clients of a store outside a cordoned off off area after a van ploughed into the crowd, killing 13 persons and injuring over 80 on the Rambla in Barcelona on August 17, 2017 LLUIS GENE/AFP/Getty Images

Prime Minister Mariano Rajoy, who was on a vacation, cut short his trip and returned to Barcelona. He strongly condemned the attacks and termed them "jihadi terrorism". He also convened an emergency meeting in the early hours of Friday (18 August).

Three days of mourning has been declared by the interior chief of Spain's Catalonia region to honour the victims of the attacks.

Spain terror attack
Spanish Prime Minister Mariano Rajoy (C) speaks during a meeting following the attack of Barcelona on August 17, 2017, when a van ploughed into the crowd, killing at least 13 people and injuring around 100 others on the Rambla in Barcelona LLUIS GENE/AFP/Getty Images
Spain terror attack
Barcelona's Mayor Ada Colau (3rdL) and officials arrive on the Rambla boulevard after a van ploughed into the crowd, killing at least 13 people and injuring around 100 others on the Rambla in Barcelona on August 17, 2017 Getty Images
Spain terror attack
A general view of paramedics at the scene of a terrorist attack in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city this afternoon David Ramos/Getty Images
Spain terror attack
People look toward the scene of a terrorist attack in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city this afternoon David Ramos/Getty Images
Spain terror attack
The lights of One World Trade Center in New York are lit in the colors of the Spanish flag to honor the victims of the Barcelona terror attack on August 17, 2017 BRYAN R. SMITH/AFP/Getty Images

Los Mossos d'Esquadra, the police force for the Catalonia region, said the van attack is linked to an explosion a day prior in which one person was killed, according to Spain's El Pais.

Many global leaders have condemned the deadly attack, including US President Donald Trump. Major landmarks across the globe, including the New York's World Trade Center tower and the Paris's Eiffel Tower have been lit in the colours of the Spanish national flag to express solidarity with the victims of the attacks.

Spain terror attack
A general view of the scene of a terrorist attack in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city this afternoon David Ramos/Getty Images
Spain terror attack
Medics and police tend to injured people near the scene of a terrorist attack in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 100 injured after a van plowed into people in the Las Ramblas area of the city this afternoon Nicolas Carvalho Ochoa/Getty Images
Spain terror attack
The van suspected of having been used in the Barcelona attack is towed away from the area where it crashed into pedestrians at Las Ramblas Reuters