It was a gas explosion at a bakery near the corner of Ste. Cecile and Rue de Trevise . Emergency fire crew was already at site when it blew , killing two firefighters and a Spanish tourist lady having breakfast in the bakery . Photos from the scene are horrendous – as bad as a war zone . Daily Mail site has detailed photos . I will not post here .
The location is about midway between Montmartre and the Pompidou Center .