The airline Singapore Airlines has had to reassure enraged passengers who felt watched on board by cameras. In social media, customers of the airline had expressed their displeasure: "Have just discovered an interesting sensor that looks at me from the back of the front seat," wrote a passenger on Twitter.

Just found this interesting sensor looking at the seat on board of Singapore Airlines. Any expert opinion of this a camera? Perhaps @SingaporeAir could clarify how it is used? pic.twitter.com/vy0usqruZG

- Vitaly Kamluk (@vkamluk) February 17, 2019

Another called on the airline on Twitter to "inform all passengers and obtain their permission" to be watched by cameras.

In a statement released on Thursday, the company claimed that the small cameras installed in newer machines next to the screen of the on-board entertainment system were out of order and in no way intended to monitor the passengers during the flight.

Hi there, these cameras are provided by the original equipment manufacturers. We have no plans to enable or develop any features using the cameras.

- Singapore Airlines (@SingaporeAir) February 19, 2019

The manufacturer has installed the cameras "for future use," said Singapore Airlines. "We have no plans to use these cameras." But the announcement is not enough for some angry passengers. They claim to cover the lenses with stickers.

So ... basically I have a roll of bright yellow electrical tape in my bag. Sigh. , Not cool @singaporeair not cool at all. Does not matter what you say, those cameras need to be covered if they are 'disabled', as you say.

- CyberSharpAware (@cybersharpaware) February 18, 2019