The FAA will soon implement temporary drone flight bans over parts of New York, and is warning that deadly force could be used if violated. Billy Nolen, former acting administrator for the FAA, says the move is likely being made out of an “abundance of caution.

Residents of both states have been growing increasingly alarmed over the past month by unexplained bright lights in the nighttime skies and frustrated by a lack of answers.

The Federal Aviation Administration said on Thursday it was temporarily barring drone flights over dozens of critical infrastructure sites in New Jersey and New York.