Her final text contained just a single word, but it haunts Jean Hanlon's (pictured) family to this day. 'Help', the message read.

A gas explosion has occurred in the fifth arrondissement of Paris, resulting in several buildings catching fire, said a local Paris city official on Twitter on Wednesday.

The Paris police department said they were making checks on the incident.

They also warned people to avoid the area. 

French Interior Minister Gerald Darmanin said a fire was underway on Rue Saint-Jacques in Paris’ fifth arrondissement, close to the Jardin Du Luxembourg and Sorbonne University.