Washington, June 14: US officials have said that a native Israeli woman living in Wisconsin coached potential Islamic State attackers on how to cook up ricin and kept a library of books on making bombs, poisons and suicide vests. The Justice Department charged Waheba Issa Dais with attempting to provide material support to Islamic State after arresting the 45-year-old divorcee in Cudahy, Wisconsin yesterday.

She was said to be the first person in six months to be arrested on charges of supporting a violent jihadist group. Dais, a legal US resident since 1992, used a number of social media accounts, including accounts hijacked from others, to promote the Islamic State group and facilitate recruitment, according to an indictment. She maintained a digital “library of instructions on how to make bombs, biological weapons, poisons and suicide vests” to assist Islamic State supporters in plotting attacks.

She encouraged one person, apparently a law enforcement informant, on how to make the poison ricin and “suggested the individual introduce the ricin to a government post or water reservoirs,” it said. She also allegedly suggested targets for bomb attacks including street festivals and other summer celebrations.