LITTLE ROCK, Ark. (KTHV) - Extra security has been added to the Pulaski County Jail after a number of inmates got sick in March from drugs that were smuggled in to the jail.

In surveillance footage from the jail's exercise yard, someone parks their car outside the jail, approaches the exercise yard, and throws something on top of the chain link fence that used to cover the yard. Inmates then lifted up one person who grabbed the item.

The inmates then got sick from smoking K2, a dangerous synthetic form of marijuana. It can have symptoms like vomiting, profuse sweating, and hallucinations.

"We always worry about contraband being brought into the jail," said Lieutenant Cody Burk with the Pulaski County Sheriff's Office. "It can be brought in through the mail. We check the mail. People try to smuggle it in just all different types of fashions.”

The inmates recovered from the incident, but after the incident, Sheriff Doc Holladay put inmate crews to work to resolve the issue.

"Those buildings that are out from the main building, those were the outside recreation yard areas. It had a chain link fence similar to this one. However, you can tell it's only about 30 to 40 feet from the outside fence," Burk explained.

The exercise yard is now enclosed on all sides, including the top, so drugs or worse can't be smuggled in.

"We just try to stay on top of all the ways things could get smuggled in here," Burk said. "This was one of the areas we identified as being a problem.”

Three men were given additional charges of furnishing prohibited article within the jail.