Attorney General Douglas F. Gansler has sent letters to 10 e-cigarette manufacturers questioning what the companies are doing to prevent sales to underage buyers.
The letters come as the safety and regulation of the devices face increased scrutiny. The makers of e-cigarettes say the devices are safer than traditional cigarettes and can help smokers quit, but reports of poisonings related to the products have spiked. The U.S. Food and Drug Administration recently said it is seeking regulatory authority over the devices.
The battery-operated devices mimic smoking a traditional cigarette but emit flavored vapor rather than smoke.
Gansler, who is running for the Democratic...