In the wake of unconfirmed claims that Unidentified Flying Objects being sighted by people in several parts of the country, Jalaldeen said there was no clear evidence to confirm such rumours.
However, Newsfirst television channel showed footage of the strange lights visible in the night sky.
It claimed those unidentified lights was witnessed in the skies above Hambegamuwa in Thanamalwila in the Eastern province at around 8.30 on Monday night.
The channel also showed images captured on a mobile phone camera, in the southern skies above Ambalanthota.
An unidentified light was also recorded on a mobile phone camera in the skies above Ihalayagoda from Gampaha which is in the western province.
Jalaldeen said that SLAF had their own air defence system in place round the clock, but it had not detected any such objects coming to Sri Lanka though some people had seen a beam of light emanating from an object as shown on TV.