The same rules do not apply to recreational drone flights.
Mr. Ensher later expanded the idea to include sharing information from unarmed drone flights.
Rules on drone flights in the US are currently under revision by the FAA, seeking to enable safe but regulated commercial drone flights.
In 2013, he denied requests to launch American drone flights from Davao.
A collection of unexplained drone flights over Paris earlier in March also caused alarm.
The FAA has so far approved only a handful of special permits for commercial drone flights.
Congress has instructed the FAA to allow commercial drone flights by September of 2015.
The US has also provided with intelligence for their airstrikes, and even flown surveillance drone flights for them.
Most of the drone flights would have to take off from Turkey and would need Ankara's permission.
The authorities are investigating whether the sightings were really drone flights, said a police source who declined to be named.
The Pentagon has plans further to increase the number of daily drone flights by 50% by 2019.
