(CNN) The US Food and Drug Administration has received 127 reports of seizures or other neurological symptoms possibly related to e-cigarettes, the agency announced Wednesday. Investigators have yet to determine, however, whether vaping was directly linked to the cases.

"The FDA is continuing its scientific investigation to determine if there's a direct relationship between the use of e-cigarettes and a risk of seizure or other neurological symptoms," said Dr. Ned Sharpless, the acting FDA commissioner.

The FDA said the reported cases occurred between 2010 and 2019, and in addition to seizures, some people reported fainting or tremors. Sharpless said that "we still don't have enough information to determine if e-cigarettes are causing these reported incidents" but called on the public to continue submitting reports.

Additional information "may help us identify common risk factors and determine whether any specific e-cigarette product attributes, such as nicotine content or formulation, may be more likely to contribute to seizures," he said.

Dozens of new reports, no clear patterns

Read More