The U.S. Food and Drug Administration is investigating 127 reports of people having seizures following the use of e-cigarettes, the regulator said in an Aug. 7 statement.

The FDA originally warned of such cases in April, when it identified 35 e-cigarette users who had suffered from seizures. Since then, the agency has received 92 new reports from people who have reported seizures.

The cases were reported between 2010 and 2019.

Acting FDA Commissioner Ned Sharpless said the agency is continuing its investigation to determine if a direct link exists between the use of e-cigarettes and risk of seizure or other neurological symptoms. Sharpless also encouraged members of the public to submit new or follow-up reports with as much information as possible.

"Although we still don't have enough information to determine if e-cigarettes are causing these reported incidents, we believe it's critical to keep the public updated on the information we've received based on the agency's initial request for reports earlier this year," Sharpless said.

According to the National Capital Poison Center, e-cigarettes contain liquid nicotine, a poisonous chemical found in the tobacco plant. Nicotine poisoning often causes nausea, vomiting, dizziness, tremors and sweating.