Jay Pickett, a veteran actor best known for his roles on such daytime dramas as General Hospital, Port Charles, and Days of Our Lives, died on Friday while shooting a movie.

The film was titled Treasure Valley.

And Pickett was 60 years old.

Director and producer Travis Mills confirmed the shocking news on the movie's official Facebook page Sunday, saying Pickett appeared to have suffered a heart attack on set.

However, there is still no "official explanation for the cause of death," he emphasized.

Wrote Mills:

"Many of you have already heard about the tragedy that happened two days ago. Jay Pickett, our leading man, writer, producer, and creator of this movie passed away suddenly while we were on location preparing to film a scene."

Continued the sad message:

"There is no official explanation for the cause of his death but it appears to have been a heart attack.

"Everyone present tried as hard as they could to keep him alive.

"Our hearts are broken and we grieve for his family who are so devastated by this shocking tragedy."

Actor Jim Heffel, meanwhile, wrote in a separate post that the actor "died sitting on a horse ready to rope a steer in the movie Treasure Valley in Idaho."

"Yesterday I lost a good friend and the world lost a great person. Jay Pickett decided to ride off into the Heavens," Heffel said.

"Jay wrote the story and starred in it. He was also coproducer with myself and Vernon Walker. He will be truly missed. Ride like the wind."

Pickett began his soap opera career in 1991, portraying Dr. Chip Lakin on Days of Our Lives.

He went on to star as Frank Scanlon on Port Charles for over 700 episodes between 1997-2003 ... and also appeared on General Hospital as Detective David Harper from 2006-2008.

Mills also praised Pickett and spoke highly of working with him on the big screen project.

"As so many of us know, Jay was an incredible man. He was kind, sweet, and generous. He was one of the best actors I ever worked with and it was an honor to collaborate with him," the director wrote.

And he concluded:

"Everyone who met him, even for the briefest moment, could feel his warmth, his wonderful spirit. It is difficult to find the words right now to say more.

"His closest friends have said that he was very happy making Treasure Valley and my hope is that he truly was. He was doing what he loved: acting, riding horses, making movies.

"And he was magnificent."

Jay Pickett is survived by his wife Elena and their three children, according to Deadline.

We send our condolences to his friends, family members and loved ones.

May he rest in peace.

View Slideshow: Celebrities Who Died In 2021: In Memoriam