A drone dropped a package of drugs into a US prison yard while inmates were outside, sparking a fight, prison officials said.
The package was dropped July 29 at the Mansfield Correctional Institution in Ohio, creating a new front in the war on drugs in prison.
It contained almost a quarter of an ounce (7 grams) of heroin, over 2 ounces (57 grams) of marijuana and more than 5 ounces (140 grams) of tobacco, JoEllen Smith, a spokeman for the Department of Rehabilitation and Correction, told the Mansfield News Journal.
Ms Smith said there have been other instances of drones breaching security and the agency is taking steps to increase awareness and improve drone detection.
According to the department, video footage showed the drone over recreation yards immediately before a fight began.