Andrew Kreisberg, the showrunner of “The Flash” and the executive producer of CW shows like “Arrow,” “Supergirl,” and “DC’s Legends of Tomorrow,” was suspended by Warner Bros. TV Group after 15 women and four men accused him of sexual harassment.

“We have recently been made aware of allegations of misconduct against Andrew Kreisberg,” said Warner Bros. TV Group in a statement to Variety on Friday.

“We have suspended Mr. Kreisberg and are conducting an internal investigation. We take all allegations of misconduct extremely seriously, and are committed to creating a safe working environment for our employees and everyone involved in our productions.”

According to Article Bio, Kreisberg was born on April 23, 1971. He graduated from Boston University College of Communication in 1993.

He began his career with the 2005 TV movie “Halley’s Comet," which he wrote and which was inspired by the death of his sister, who died at the age of 16 due to cancer.

Since then Kreisberg went on to write scripts for TV shows such as “The Simpsons,” “Hope & Faith,” “Justice League,” “The Vampire Diaries,” “My Family,” and “Lipstick Jungle.”

Andrew Kreisberg Executive producer Andrew Kreisberg speaks onstage at the 'What's Next for 'Supergirl,' 'The Flash,' 'Arrow' and 'DC's Legends of Tomorrow': The Executive Producers' panel discussion during The CW portion of the 2016 Television Critics Association Summer Tour at The Beverly Hilton Hotel in Beverly Hills, California, Aug. 11, 2016 Photo: Getty Images/ Frederick M. Brown

In 2011, he began developing the show “Arrow” alongside Marc Guggenheim and Greg Berlanti, which is based on DC Comics character Green Arrow. He has also written comic book series entitled “Batman Confidential” and “Green Arrow & Black Canary.”

In November 2015, he signed a multi-year contract with Warner Bros. TV.

Kreisberg has been pretty secretive about his personal life, and has never been known to have a wife or a girlfriend. However, after the executive producer posted a picture on Instagram, in which he posed with an unknown woman, captioned, “Thanks for letting hob and nob at wonder woman,” many people started speculating that he was dating the woman in the picture.

The 19 sources who spoke to Variety on condition of anonymity had either witnessed or been subjected to Kreisberg’s sexual misconduct.

Kreisberg has been accused of frequently touching people without their permission, asking for massages from female staff, and kissing women without their consent.

Kreisberg has denied any wrongdoing on his part. “I have made comments on women’s appearances and clothes in my capacity as an executive producer, but they were not sexualized,” he said. “Like many people, I have given someone a non-sexual hug or kiss on the cheek. I have proudly mentored both male and female colleagues for many years. But never in what I believe to be an unwanted way and certainly never in a sexual way.”

The Flash Andrew Kreisberg, was suspended by Warner Bros. TV Group after 15 women and four men came forward accusing him of sexual harassment. In this photo, Jesse L. Martin, Greg Berlanti, John Wesley Shipp, Danielle Panabaker, Andrew Kreisberg, Candice Patton, Grant Gustin, and Tom Cavanagh of 'The Flash' attend Comic-Con International 2014 in San Diego, California, July 26, 2014. Photo: Getty Images/ Michael Yarish

A female producer said she had brought up Kreisberg's less-than-appropriate behavior to the notice of a senior executive at Berlanti Productions, which oversees Kreisberg’s shows, in 2016. “There was zero response,” this woman said. “Nothing happened. Nothing changed.”

According to sources close to Berlanti Productions, they were never aware of the serious nature of the allegations until now.

“We were recently made aware of some deeply troubling allegations regarding one of our showrunners,” Greg Berlanti and Sarah Schechter, who head Berlanti Productions, said. “We have been encouraging and fully cooperating with the investigation into this by Warner Bros.”

“There is nothing more important to us than the safety and well-being of our cast, crew, writers, producers and any staff," they added. “We do not tolerate harassment and are committed to doing everything we can to make an environment that’s safe to work in and safe to speak up about if it isn’t.”