Police across Long Island are increasing enforcement against illegal e-bike use, but children and teenagers too young to ride continue to be injured in crashes.

Under New York law, riders must be at least 16 years old to operate an e-bike. Despite that requirement, at least four children between the ages of 10 and 14 have been seriously injured in e-bike crashes since April. In November, a 14-year-old boy was killed in a crash in North Bellmore.

Authorities in both Nassau and Suffolk counties say they are stepping up efforts to reign in illegal e-bike operation. Since May, Suffolk County police have impounded 77 e-bikes. In Nassau County, police reported 120 incidents involving underage riders over the past year, resulting in the impoundment of 88 e-bikes.

The New York State Police have also issued a public warning reminding parents and guardians that repeated violations involving minors could lead to potential criminal charges for the responsible adult, including endangering the welfare of a child.

Safety advocates say enforcement alone will not solve the problem. Cindy Brown of the New York Coalition for Transportation Safety said parents need to better understand the risks associated with e-bikes before allowing their children to ride them.

"They need to be made much more aware of the hazards associated with riding these things," Brown said.

Brown said children continue to be injured despite increased police enforcement.

"It's really an issue, and it's just not going away," she said. "No matter how much we talk about it, it just seems to be getting worse, not better."

Officials are also reminding families that helmets are required for all e-bike riders who are 16 and 17 years old. Experts say parents should familiarize themselves with New York's age restrictions and safety requirements before purchasing an e-bike for a child.