Shares of Six Flags Entertainment declined more than 14% Tuesday following a deadly roller coaster incident at one of its amusement parks in Georgia.

One person died and several others were injured Monday in an incident at Six Flags Over Georgia, according to a statement from Georgia's Cobb County Board of Commissioners. The board's chairwoman, Lisa N. Cupid, said that county authorities are working with Six Flags and other partners in the investigation.

According to reports citing local police, the incident occurred on the Atlanta-area park's 200-foot-tall Goliath roller coaster shortly before 4 p.m. Monday. Riders were later seen being evacuated from the roller coaster after it stopped near the top of the ride, according to the report. 

Witnesses told a local news station that they saw a man fall from the roller coaster and strike the ride several times.

A park spokesperson for Six Flags Over Georgia told CNBC that the park team is cooperating with local authorities and providing support to those affected by the tragedy, and that Six Flags Entertainment is temporarily closing Georgia's Goliath and nine other similar attractions at its parks.

"We were deeply saddened by the guest incident at one of our parks yesterday. Our thoughts and heartfelt condolences are with the guest's family, friends, and loved ones," the spokesperson said.