Waltham residents remain perplexed by flashing lights spotted in the night sky on Friday.
The lights, which appeared to be coming from the south east and were said to be "too big to have been planes", have caused confusion and left some locals feeling uneasy.
It is the latest strange incident to take place in Lincolnshire in recent years: 'Men in Black' in Spalding, 2006
Three men dressed in black apparently visited a member of the public in Spalding who had reported a UFO encounter to police.
The incident, said to have been witnessed by a friend of the individual, was reported on September 29, 2006.
After the supposed visit, the individual who reported the UFO sighting had no recollection of doing so, or of seeing the men dressed in black.
The encounter featured in a raft of UFO documents released to the public last summer by The National Archives. 'UFO damages wind farm' in Conisholme, 2009
Mysterious damage inflicted upon a wind farm turbine gripped the nation in 2009.
The turbine at Conisholme lost one 66ft (20m) blade and another was badly damaged in the early hours of January 4.
UFO enthusiasts claimed the damage was caused by a mystery aircraft. County councillor for the area Robert Palmer said he had seen a "round, white light that seemed to be hovering".
Ecotricity, which owned the site, said the extent of damage was "unique". Founder Dale Vince told the BBC: "We have been crawling all over it and have sent bits off for analysis to see if we can work out what caused it.
"Until we have some idea, some plausible explanation that it was not a UFO, I don't think we should rule it out".
He added: "To make one of these blades fall off, or to bend it, takes a lot."
Dozens of witnesses reported seeing flashing orange-coloured lights following the incident, and a range of theories emerged in the national media.
Manufacturer Enercon later released a report suggesting the £1m turbine had suffered mechanical failure causing one of its 65ft blades to break off. UFO 'scared off' by RAF aircraft in Cleethorpes, 1956
In September 1956 the RAF station in Manby logged and observed, through telescope and radar, an 80ft in diameter UFO hovering at 54,000ft over Cleethorpes.
The spherical, glass-like object was visible for more than an hour and disappeared only when it was approached by RAF aircraft. Pilot 'disappears' after making contact with UFO over North Sea, 1970
American exchange pilot Captain William Schaffner disappeared after allegedly making visual contact with a UFO while flying a Lightning F6 jet over the North Sea.
Legend has it the aircraft was found on the seabed with its canopy closed and pilot seat empty.
According to one version of events, Captain Schaffner had joined an airborne investigation into an unidentified aircraft which was travelling at speeds of around 17,000mph between the Shetland Islands and Norway.
When Captain Schaffner, using the callsign Foxtrot 94, reached the object, it was alleged he saw a conical shape surrounded by light with a separate spherical, glass-like object nearby.
The radar signals of the two objects then merged into one, hovering motionless over the sea, before one sped away at more than 20,000mph.
But the Ministry of Defence later said Captain Schaffner was taking part in a Tactical Evaluation exercise on the night he disappeared. The 'UFO' was, in fact, a slow-moving RAF Shackleton which he was sent to shadow.
The MoD claims Captain Schaffner flew dangerously low below the Shackleton and the aircraft hit the sea. It said after hitting the sea Captain Schaffner opened the canopy manually to escape the sinking aircraft.
However, he became separated from his emergency life support equipment and was lost at sea.
The canopy closed as the hydraulic pressure decayed whilst the aircraft was sinking.
This, the MoD claims, explains the mystery of the closed canopy. Police officers in Boston and Skegness spot UFO, 1996
Police officers and a ship's crew witnessed rotating multi-coloured lights in the sky near the east coast of England, Ministry of Defence files released in 2010 showed.
Police officers in Boston and Skegness saw the UFOs above the North Sea on October 5, 1996 and contacted the coastguards, who in turn alerted ships in the area.
The lights were also observed by the crew of a ship in The Wash, the estuary on the north-west margin of East Anglia.
Simultaneously, RAF air defence radars at RAF Neatishead in Norfolk detected an unidentified blip over Boston.
But the RAF report concluded the radar imagery was caused by St Botolph's church spire in Boston. Two red lights in Lincolnshire sky, 2013
This video captured in April appears to show two flashing red lights in the sky: Bright light near Humber Bridge, 1997
Two people travelling in a car along the road between the Humber Bridge and the Barnetby Top roundabout claimed to have spotted a large bright light with a black triangular-shaped wing protruding from the side of it.
Spotted in December 1997, the light was flying low and at considerable speed across the road.
Neither Humberside Police nor air traffic controllers at Humberside Airport could explain the incident.
A spokesman for the Humber Coastguard said a call had been received that evening from someone who reported seeing something black going out to sea about five miles off the coast of Hornsea in East Yorkshire. Red ball in Cleethorpes, 2000
Cliff and Margaret Blyth, of Corn Mews, Cleethorpes, claimed an unidentified red ball hurtled towards their house and passed through Mr Blyth's body.
Mrs Blyth was on the telephone when her husband shouted to at her to look through the window.
She said: ''I left the phone dangling as I saw a two-inch red ball of fire come through the window and pass through my husband's chest.
"We immediately lifted his shirt to see if it had left a mark, but there was nothing there."
Mr Blyth said: "I'm too old to be scared, it didn't hurt but we both saw it and my wife never drinks." 'Crop circles' near Louth, 2011
Video footage supposedly showing crop circles near Louth surfaced in June 2011.
The footage, filmed at Bluestone Heath Road, Worlaby, has been viewed on YouTube more than 12,000 times: Lights in the sky in Grimsby, 2006
A streaking light with a trail much like a shooting star and an orange-coloured afterglow was spotted by a number of people in December 2006.
One eyewitness said the object, spotted over the A16 between Grimsby and Lout, levelled off towards the North Sea and had a flashing strobe light which continued to move across the horizon at high speed.
Another resident also saw the mysterious lights but dismissed them as a meteor shower.
• Interactive map: UFO sightings and alien encounters in Grimsby and northern Lincolnshire
