ACWORTH — Federal agents today raided four Smoke 911 shops and the Marietta home of the stores’ owner, Michael T. Madlem, seeking evidence related to synthetic marijuana and “bath salts.”

No arrests were made, according to the U.S. Attorney’s Office.

Federal seizure warrants were also executed for bank accounts of Madlem and those of Serena P. Burkard and Mad Dog USA Enterprises LLC.

“Bath salts” are synthetic cathinones, which are typically sold in powder and pill form for $60 to $100 per gram, according to the U.S. Attorney’s Office. The effects of “bath salts” have been described as being similar to those caused by other stimulants such as methamphetamine, MDMA (ecstasy), and cocaine.

In a statement, the U.S. Attorney’s Office said that five types of synthetic marijuana are designated as controlled substances under federal law, while several others are listed administratively under Schedule I of the Controlled Substances Act by DEA. Two types of “bath salts” are listed as controlled substances permanently, and one additional type is listed administratively under Schedule I of the Controlled Substances Act by DEA.

The Marietta-Cobb-Smyrna Narcotics Units, as well as Roswell and Sandy Springs police, Cherokee County narcotics officers and the Georgia Bureau of Investigation assisted federal agents