The Islamic State has claimed responsibility in the attack that killed 129 people in Paris with over 350 injured and 99 of them critically. The attacks were the deadliest violence in France since World War II.

Officials said that the attack was planned in Syria and organized in Belgium. French police raided an apartment building on Wednesday, Nov. 18 at 4:15 a.m. where authorities believed the mastermind of the attacks was held. The 7-hour siege ended with two deaths and eight arrests.

According to the Associated Press, Paris prosecutor Francois Molins said Islamic State militant Abdelhamid Abaaoud was not among those arrested, but there was no word if he was among the dead.

French President Francois Hollande declared war on ISIS and has been carrying out airstrikes with help from the United States.

ISIS released a video saying Washington D.C. will be it’s next target. The Department of Homeland Security is taking the threats seriously and have said they will do everything to prevent tragedy from occurring.

U.S. governors from 26 states have said that they will not accept any Syrian refugees in response to these attacks.