Amazon has been forced to fix an issue with its virtual assistant Alexa, after a number of users reported hearing spontaneous laughter from their devices.

Amazon Echo

Amazon Echo

Owners of the smart speaker Amazon Echo, and other supported devices, took to social media to voice their complaints after they began hearing unprompted "creepy" laughter from the smart assistant. Some of the reported incidents have occurred in empty rooms.

An Amazon spokesperson explained away the impromptu giggles by saying: "In rare circumstances, Alexa can mistakenly hear the phrase 'Alexa, laugh.' "

The online retailers have now issued a fix for the glitch, by disabling the "Alexa, laugh" command, and replacing it with, "Alexa, can you laugh?"

The virtual assistant's response will also be updated from just laughter, to, "Sure, I can laugh."

Growing concerns about the system have previously been reported as the software sends voice recordings "to the cloud for processing", prompting fears that it is "eavesdropping" on owners.

One user recently claimed their Alexa gadget began listing local funeral homes and burial grounds of its own accord.

And another customer complained after their Alexa device accidentally ordered cat food after hearing an advert on TV.

Originally screened last October, the advert features people using the technology in different situations, and the customer's device reacted after a man could be heard saying: "Alexa, re-order Purina cat food".