British Professor Tony Dyson, creator of the original round-domed R2-D2 droid from the Star Wars series, has been found dead at his private residence on the Maltese island Gozo, officials said on Friday.

The 68-year-old robotics sculptor was found by police after a neighbor called in, concerned that Dyson’s door had been left open. It is also understood that no one had seen him for several days. While Dyson is thought to have died of natural causes, local authorities have opened a magisterial inquiry and launched an official investigation.

Dyson was one of the guests at this year's Malta Comic Con. The event took place right before the premiere of the new Star Wars movie, ’The Force Awakens’, and the organizers thought it wise to invite the craftsman behind one of the symbols of the series.

“We knew he lived in Gozo, so we knew we had to invite him over to the Con,” Christopher Muscat, a Con organizer, told Malta Today. “But to our surprise, this year he contacted us himself.”

Muscat described the 68-year-old designer as a surprisingly energetic person.

“We lost not only the creator of an icon but a legend himself,” Muscat added.

Dyson helped build the iconic Star Wars robot R2-D2 back in 1977. The design of R2-D2 was initially created by conceptual designer Ralph McQuarrie, to whom we also owe the looks of Darth Vader, Chewbacca and C-3PO. The owner of The White Horse Toy Company at the time, Tony Dyson was commissioned to make eight R2-D2 robots for the film series. He often called his work on the project “one of the most exciting periods” of his life.

On social media, Star Wars fans have been paying tribute to Dyson and his most famous creation.

Passed into The Force Tony Dyson has, aged 68, the creator of R2D2 he was, hmmm pic.twitter.com/qlSl4ga8h5 — Yoda (@JediEconomist) 4 марта 2016 г.

Had no idea the creator of R2-D2 & Moonraker jetpacks lived in Malta. Saddened to hear of his passing. https://t.co/b1hCS6LMb2 — Ian Goodhead (@IanGoodhead) March 4, 2016

Last week we met #TonyDyson, one of the creators of R2-D2. Today we received the sad news that he passed away. pic.twitter.com/m2GoIsyYvi — Dutch Garrison (@DutchGarrison) March 4, 2016

Dyson also worked on other movies such as Superman ll, Moonraker (from the Bond series) and Dragon Slayer, and was nominated for an Emmy award for his film special effects supervision. He also designed and built robots for some of the largest electronic companies including Sony, Philips and Toshiba, as well as for a number of TV commercials and amusement parks around the world.

Often asked about what advice he would give to the next generation of designers, Dyson usually said: “Be playful. Never stop playing. If you look at life the way it really should be – enjoyed – then you become very creative.”