A series of drone sightings over military bases across the country have renewed concerns that the US doesn’t have clear government-wide policy for how to deal with unauthorized incursions that could potentially pose a national security threat.

A Pentagon spokesperson said the military is sending counter-drone systems to Picatinny Arsenal and Naval Weapons Station Earle.

There have been a series of mystery drone sightings across the United States and near American bases in European countries.

The Pentagon has shipped anti-drone technology to an area of New Jersey located where sightings of mysterious aircraft have set residents on edge and drawn accusations that the federal government isn’t taking the incidents seriously.