Munich police are hunting for two drone operators who allegedly spied on a naked sunbather, they announced on Friday.

A 25-year-old woman was lying naked on her rooftop catching some early spring sunshine, when she realized a camera-equipped drone was flying above her, police said.

She quickly got dressed and confronted two men who, by then, were packing up a drone in the street. They denied filming her and left the area.

The Commissariat 15, Bavaria's sexual offenses police unit, opened up an investigation into a violation of privacy laws and a possible infringement of Germany's Air Traffic Act (Luftverkehrsgestz).

People all over Munich enjoyed the sun that day as temperatures hit 22 degrees Celsius (72 degrees Fahrenheit) in the warmest day of the year so far.

The alleged perpetrators were both aged between 40 and 45 old and spoke with a Bavarian accent.

Germany recently announced more stringent regulations for civilian drones, banning drones above 250 grams (9 ounces) from flying above residential areas.

Munich daily "Süddeutsche Zeitung" reported it wasn't the first drone encounter for Munich police. In January a car collided with a 1.2-kilogram (2.6-pound) drone that landed on a busy highway, the paper reported. In October a drone operator in the city was facing possible jail after a 1.7 kilogram drone narrowly missed a family of four, the paper reported. And in October a drone at Munich Airport came dangerously close to an Airbus A321 coming in to land.

It is estimated that there are more than 400,000 drones in Germany.

aw/msh (dpa)