ORLANDO, Fla. — Four people were taken to hospitals after an incident at Universal's Volcano Bay water park on Sunday.

• Volcano Bay workers taken to hospital, Universal confirmed
• Spokesperson says there were "technical issues" at park
• Guests reportedly complained of feeling "electric shock"

Records show that the Orlando Fire Department responded to the water park for what Universal called a "technical issue."

Universal employees, known as team members, were taken to hospitals "out of an abundance of caution," Universal spokesman Tom Schroder said in a statement Sunday. They have since been discharged.

The incident also caused the water park to close early.

"We've had some technical issues at Volcano Bay today," Schroder wrote in an email. "As a result, we've closed the park early while we continue our work to resolve this issue."

The water park reopened Monday.

Universal hasn't specified what the "technical issues" were. But guests visiting the water park Sunday complained of feeling an "electric shock" near some of the rides. In a Facebook post, one guest said her sisters experienced an "electric shock" while walking near the lazy river. She said they alerted Universal team members of the issue.

Volcano Bay opened in 2017 and features dozens of attractions, including the Krakatau Aqua Coaster, which is located at the water park's 200-foot-tall volcano.