140 people have been confirmed dead in what is one of the deadliest terrorist attacks in Europe
France has declared a national state of emergency and has closed its borders after scores of people were killed in multiple gun and bomb attacks in Paris.
At least 100 people are reported to have died at the Bataclan concert hall in central Paris.
Gunmen took many hostages there before being overpowered when police stormed the building.
Others died in attacks near the Stade de France, with some reports suggesting a suicide blast, and at restaurants.
Paris residents have been asked to stay indoors and military personnel are being deployed across the city.
The deadliest attack appears to have targeted the Bataclan concert hall. The BBC's Hugh Schofield says scores of ambulances have arrived at the scene, suggesting many victims inside.
Other attacks hit neighbouring Le Petit Cambodge and Le Carillon restaurants in the 10th district where a BBC reporter could see 10 people lying on the road, either dead or seriously injured.
And an eyewitness told Liberation newspaper that he had heard more than 100 rounds being fired at La Belle Equipe cafe in the 11th district.
Gunfire was also heard at Les Halles shopping centre.
US President Barack Obama spoke of "an outrageous attempt to terrorise innocent civilians".
UK PM David Cameron said he was shocked and pledged to do "whatever we can to help".