A man lights candles during the fourth annual remembrance event for the missing Malaysia Airlines flight MH370, in Kuala Lumpur, Malaysia, March 3, 2018. Reuters/Lai Seng Sin

Since Malaysia Airlines Flight MH370 went missing on March 8, 2014, several amateur hunters have come forward claiming to have found debris pieces of the missing jet. Recently, a pair — who work as radio presenters — claimed to have spotted a "man made-looking dome object" in the ocean off the coast of Mauritius.

According to U.K.'s the Sun, Duncan Heyde and Thane Kirby, from New Zealand, were looking for Flight MH370 wreckage during a trip to Mauritius, a small island near where plane debris has previously been found. The duo reportedly spent two days on the water trying to spot the suspected wreckage. They based their search on coordinates provided by amateur crash investigator Peter McMahon.

"We did see an item of interest at one of the coordinates. We managed to go over it five or six times but couldn't stay on it due to the testing weather conditions in the area," Heyde told the Sun. Heyde and Kirby's claims have not been officially confirmed.

McMahon is the same person who claimed in March to have found missing Flight MH370 with "bullet holes." He said Google Earth images purportedly show the missing jetliner in the water 10 miles south of Mauritius.

However, a representative for the Joint Agency Coordination Center told Fox News in a statement at the time that McMahon reached out to the agency in 2016 and 2017, but at no time "did the ATSB suggest [McMahon's] evidence could be missing flight MH370."

The disappearance of Flight MH370, which went missing with 239 people on board while on its way from Kuala Lumpur to Beijing, remains a mystery as there is no concrete evidence to prove what happened to the jet. Australia, China and Malaysia spent millions of dollars in joint operations to search for the plane.

The biggest lead in the investigation came when a plane flaperon was found by villagers on Réunion Island. Later, authorities confirmed the flaperon belonged to the missing jetliner. Several other debris pieces washed up on shores of nearby islands, including Mauritius. Of the several pieces of debris, some were confirmed to be from a plane.

Earlier this year, Malaysia agreed to pay United States firm Ocean Infinity up to $70 million if it found the plane during a search in a remote part of the southern Indian Ocean. The search ended in May with no sign of the plane.

Since the plane went missing, several conspiracy theories emerged about the fate of the jet. Most recently, reports claimed the plane's pilot Captain Zaharie Amad Shah deliberately crashed the jet in the Indian Ocean as part of his "murder-suicide" plan. However, Australian officials rejected the theory.

Other theories about the plane's disappearance included claims of the plane being hijacked, the plane being shot down, and a possible electrical issue resulting in a fire on board the plane, among many others.