French President Francois Hollande, in an address to the nation, said he had declared a state of emergency, meaning borders will be closed. “We have to show compassion and solidarity and we also have to show unity and keep our cool. France must be strong and great,” he said. The Paris prefecture of police is instructing residents to stay home. The prefecture said via Twitter that people should stay inside “unless there’s an absolute necessity.” French authorities have launched a terrorism investigation, Eric Pelletier, a reporter with Le Pariesien, tells CNN Paul Cruickshank. There has been no official claim for responsibility, though ISIS has applauded the attacks on Twitter, Cruickshank reports. “This is an attack not just on Paris, not just on the people on France, but an attack on all humanity and the universal values we share,” President Barack Obama said at the White House. He called the attacks an “outrageous attempt to terrorize innocent civilians.” At least 60 people have died in the attacks, CNN affiliate BFMTV reported. At least six shootings took place in Paris and three explosions took place at the Stade de France in Saint-Denis late Friday, CNN affiliate BFMTV said. Two or three gunmen entered the Bataclan concert hall while opening fire on law enforcement, BFMTV reported. A source earlier told CNN there were six to eight hostage takers, citing a person they were talking to inside the venue. Paris police tell CNN there were three attacks. Attackers reportedly used AK-47 automatic weapons.