The 49ers informed coach Mike Singletary he was fired shortly after the team returned from St. Louis, a team source with ties to his family has told The Chronicle.

Niners president Jed York hinted this move was coming but said after the game he didn’t want to make an “emotional decision” after a loss.

More to come …

Update from the sports desk:

The 49ers have confirmed the firing of head coach Mike Singletary, issuing the following statement:

The San Francisco 49ers have relieved Mike Singletary of his duties as head coach. Jim Tomsula has been named interim head coach and will serve in that capacity throughout the remainder of the season.

49ers President & CEO Jed York will be joined by Tomsula in a press conference Monday at 12 noon PT in the defensive meeting room of the team’s Santa Clara practice facility.

Tomsula is in his fourth season as the 49ers defensive line coach. Prior to joining the franchise, Tomsula enjoyed a successful nine-year career in NFL Europa that included serving as the head coach of the Rhein Fire, in 2006. Last year, 49ers defensive tackle Justin Smith was named to his first Pro Bowl under his tutelage.

Singletary released this statement:

“One of the greatest experiences of my life was having the opportunity to coach the San Francisco 49ers. What made it so special were the players. They were some of the most outstanding men I have ever been around in my life. The coaches were truly professionals. I wish the 49ers nothing but the best. I am thankful to the York family for having given me the opportunity to be a head coach in the NFL. I am indebted to them for that. I am also thankful for the Faithful fans, I am just sorry I couldn’t give them more.”

And Jed York had this to say:

“I want to thank Mike Singletary for the passion and effort that he brought to this organization. He is a tremendous person for whom I will always have great respect.”