UPDATE: Multiple reports state there are now over 100 fatalities, a number that is expected to continue to rise. The attacks were reportedly a coordinated effort at three locations throughout Paris.

An Associated Press report says several dozen people have been killed amidst violence that rocked Paris on Friday.

According to police, there was gunfire in at least a pair of restaurants in the French capital. A minimum of two explosions were also reported at the Stade de France stadium.

French media claims there is also a hostage situation developing, at a concert venue. [UPDATE: CNN is reporting that the siege is over, and that 100 people have died. It is also being reported that 100 hostages have been freed, and that two attackers have been killed.]

CNN initially reported 18 people have been killed, while the Telegraph reports 30 people have been. It's unclear if this is a work of terrorism.

Paris, of course, is no stranger to violence. Earlier this year, a dozen people were killed when gunmen opened fire at the offices of the satirical magazine Charlie Hebdo.

You can hear one of the explosions below, which occurred during a soccer match. The French president, Francois Hollande, was at the match and evacuated:

You can see an eyewitness talk about what happened below:

President Barack Obama on Paris attacks: 'This is an attack on all of humanity.'