Former Glee star Mark Salling was found dead at the Los Angeles River on Tuesday morning from an apparent suicide.

The actor’s Glee co-stars, attorney, coaches, and friends took to social media to share their condolences and memories of Salling. Salling played Noah “Puck” Puckerman on the musical television series from 2009 to 2015.

Matthew Morrison posted an old photo of himself, Salling and Cory Monteith—who passed away in 2013—on Instagram, with two angel emojis and one frowning emoji.

Director Paris Barclay also shared a photo on Twitter with the caption, “It’s a painful loss, again. Two young actors, lost too soon. RIP #marksalling.” Glee vocal coach Tim Davis also shared his condolences, and Jane Lynch retweeted Davis’ follow up message. Iqbal Theba's message on Twitter was simple: “Oh Mark.”

According to TMZ, Salling attempted suicide several times before Tuesday. Salling reportedly tried to commit suicide in Aug. 2017, before his October plea deal for his child pornography case. As part of his plea deal, Stalling was going to serve four to seven years in jail, instead of the potential maximum of 20. He was also required to pay $50,000 to each victim who requested payment.