A gangster and six other prisoners have been booked following a complaint from prison officials in Faridkot that he went live on social networking site Facebook from inside the prison, police said on Saturday.The gangster, Lakha Sidhana, went live on Facebook for nine minutes this week, giving advice to people to be careful while driving on the roads in view of the dense fog in most parts of Punjab and the accidents that were taking place due to it.Prison authorities conducted a raid inside the barracks where Sidhana and other prisoners were lodged and recovered two mobile smartphones.A complaint was made to the local police, which registered a case against seven prisoners.There have been repeated complaints from various prisons in Punjab that criminals and gangsters not only use mobiles but are regularly active on social networking sites.In some cases, the criminals were even threatening their opponents through these sites from inside the prison, while in other instances they were uploading photos and videos of their life inside the prison.