A 6,3kg drone with infrared sensors soon to be employed by Florida police over Miami.

Miami police could soon be the first in the United States to use cutting-edge, spy-in-the-sky technology to beef up their fight against crime.

A small pilotless drone manufactured by Honeywell International, capable of hovering and “staring” using electro-optic or infrared sensors, is expected to make its debut soon in the skies over the Florida Everglades.

If use of the drone wins Federal Aviation Administration approval after tests, the Miami-Dade Police Department will start flying the 6,3kg drone over urban areas with an eye toward full-fledged employment in crime fighting.

“Our intentions are to use it only in tactical situations as an extra set of eyes,” said police department spokesperson Juan Villalba.

“We intend to use this to benefit us in carrying out our mission,” he added, saying the wingless Honeywell aircraft, which fits into a backpack and is capable of vertical take-off and landing, seems ideally suited for use by SWAT teams in hostage situations or dealing with “barricaded subjects”.

Miami-Dade police are not alone, however. Taking their lead from the US military, which has used drones in Iraq and Afghanistan for years, law enforcement agencies across the country have voiced a growing interest in using drones for domestic crime-fighting missions.

Known in the aerospace industry as UAVs, for unmanned aerial vehicles, drones have been under development for decades in the US.

The CIA acknowledges that it developed a dragonfly-sized UAV, known as the “Insectohopter” for laser-guided spy operations as long ago as the 1970s. And other advanced work on robotic flyers has clearly been under way for quite some time.

“The FBI is experimenting with a variety of unmanned aerial vehicles,” said Marcus Thomas, an assistant director of the bureau’s Operational Technology Division.

“At this point they have been used mainly for search and rescue missions,” he added.

US Customs and Border Protection has been flying drones over the Arizona desert and southwest border with Mexico since 2006 and will soon deploy one in North Dakota to patrol the Canadian border as well.

This month, a Customs and Border Protection spokesperson said the agency would also begin test flights of a modified version of its large Predator B drones over the Gulf of Mexico.

Citing numerous safety concerns, the FAA – the government agency responsible for regulating civil aviation – has been slow in developing procedures for the use of UAVs by the police.

“You don’t want one of these coming down on grandma’s windshield when she’s on her way to the grocery store,” said Doug Davis, the FAA’s programme manager for unmanned aerial systems.