Image is from the BBC website

Update: CBC News: "Tunisian PM: 17 foreign tourists, 2 Tunisians killed in attack" at the National Bardo Museum. This is also confirmed by the International Business Times and other sources on Twitter (search #Bardoattack).

Italian tourists on cruise of Mediterranean were reportedly inside the museum at the time of the attack.

Radio Mosaique FM reported the death of 15 people: 13 tourists of various nationalities and two Tunisians.

Leila Fadel, Cairo Bureau Chief for NPR is on the scene and has tweeted: "Stand off at bardo museum over. Police killed two of the gunmen and captured one. #Bardoattack"

BBC reported earlier here:

At least seven foreign tourists and a Tunisian have been killed after gunmen targeted a museum in the the Tunisian capital, officials say. Tourists from several European countries were taken hostage, a local radio station reported. The shooting happened at the Bardo Museum, which is next to the parliament building in central Tunis.