Monuments around the world pay tribute to Barcelona terror attack victims: Eiffel Tower goes dark

At least 13 people were killed and more than 100 injured in a terror attack on Barcelona's Las Ramblas on Thursday.

Monuments around the world paid tributes to the victims of the attack.

The Eiffel Tower in Paris, the capital of France that has itself experienced the trauma of several terror attacks in the past three years, went dark in mourning:

New York's One World Trade Center, the towering monument to the 9/11 terror attacks, was lit in the red and yellow of the Spanish flag in tribute:

While the city's Empire State Building appeared to be lit in the red, blue and yellow of the Catalan flag:

Flags at government buildings around the world were to be flown at half mast on Friday:

Tel Aviv city hall was illuminated in the Spain flag in solidarity: