Drone detection systems are currently being deployed throughout the U.K. following rogue drone invasions over a major airport that halted flights last week.

About 1,000 flights were affected by “drone intrusions” leading to 140,000 passengers having their flight cancelled or diverted, causing chaos at the U.K.’s second largest airport over a three-day period. At the time, the government said steps had to be immediately taken to prevent such a thing happening again.

That seems to have happened. On Tuesday, Security Minister Ben Wallace said new detection systems were already in place, while anyone accused of flying a drone “recklessly or for criminal purposes” could expect to face “severe” punishment.

“The huge proliferation of such devices, coupled with the challenges of deploying military counter measures into a civilian environment, means there are no easy solutions,” Wallace said in a statement. “However, I can say that we are able to now deploy detection systems throughout the UK to combat this threat.”

It’s reported that since the event the airport has spent £5 million ($6.3 million) on such systems. It’s also offering a reward of £50,000 ($63,000) for information that might lead to the arrest of the culprits. The police found at least one crashed drone, which is now being forensically examined.

The British press reported that over the three days, there were about 200 sightings of the flying machines, but as yet it’s not known who was behind the intrusions. Authorities have ruled out terrorism. One couple from the south of England was taken into custody who later said they felt “completely violated” after having their faces exposed in the British media. They were soon let go without charge.

Wallace said he’s confident that the police “will bring to justice those responsible for what are serious criminal acts that have caused disruption and misery to thousands of passengers.”

The Labor party wasted no time to put the blame on the Conservative government, saying it has been slow to introduce stricter drone regulations. The party has also called for an independent inquiry. Over in Australia, the civil aviation authority said the invasion has compelled it to install drone-detecting sensors at airports.

Image: Eversource NH via Flickr