The number of reports has reached 100 a month, a fivefold increase from 2014, said Michael Whitaker, FAA deputy administrator.
FAA faces heat for missing deadline on drone safety rules →
"We are working diligently to develop a regulatory framework that will allow for innovation while ensuring the safety of other users of the airspace and people and property on the ground," Whitaker told the committee.
Delivery by drone in 30 minutes? Amazon says it's coming →