Ashley Madison data, the hackers claimed, contained credit card numbers and peoples’ sexual fantasies.
Some of the data has been published online already, according to the BBC, which added that the hackers, who describe themselves as Team would publish more data until Ashley Madison closed down its web site.
The BBC said Ashley Madison has 37 million users worldwide and over a million of those live in the United Kingdom.
Ashley Madison is owned by a Canadian company called Avid Life Media which said that it had now secured the web site and shut the open doors. It described the act as cyber terrorism and will bring the Team to account.