Investigators in spain are not saying if thats the same man under arrest. Elizabeth hurr, abc news, new york. Isis has claimed responsibility for the attack. A senior u. S. Official says the attack is connected to a house explosion about 120 miles south. One person died there. Spanish officials have declared three days of mourning. Officials say theres no known threats to the city. The eiffel tower went dark. The paris monument has turned off its lights in solidarity after terror attacks around the world. The last time was in may after 22 people were killed at an Ariana Grande concert in manchest manchester, england. Todays attack marks the nineth vehicle assault in a little more than a year claiming 129 live fls five different countries. The worst killed 86 people in nice, france when a tunisian man drove a truck into a crowd. Five months later an attacker killed 11 pedestrian at a Christmas Market in berlin. That was december of 2016. In april a 39yearold man drove a hijacked truck i