Evan Reed made the Tigers' Opening Day roster for the first time this season. (AP)

The Detroit Police Department has opened an investigation into an alleged incident involving Tigers reliever Evan Reed on the day before Opening Day.

Detroit Police told FOX 2 Detroit that a sexual assault complaint has been made and that an investigation is underway.

"The organization is aware of a very serious allegation that has been made against pitcher Evan Reed," the Tigers said in a statement. "This allegation is concerning and we are aware of an ongoing investigation. It would be inappropriate for the ballclub to comment further at this time."

David Gorcyca, an attorney representing Reed, confirmed in a statement that an investigation has started, but that Reed has not been contacted by the police at this point.

"I was informed this morning that the Detroit Police Department has opened an investigation involving Evan Reed," Gorcyca said in the statement. "We are very confident that once a thorough and full investigation is completed, Mr. Reed will have nothing to fear.

"During the infancy of this investigation, no one should formulate any conclusions that a crime has been committed. Mr. Reed is currently on a seven-day West Coast road trip and has not been contacted by the Detroit Police Department. We plan on cooperating with the investigation when the time is appropriate. Until then, no further comment will be made by me or Mr. Reed."

FOX 2 Detroit reported on its website that an investigation is expected to last a couple weeks. Another television station, WDIV, reported that the incident allegedly happened in a downtown location.

The Tigers are currently in Los Angeles for the start of a two-city trip for games against the Dodgers and Padres. They return home early next week.

Reed made the Opening Day roster for the first time this spring after spending four different stints in the Tigers bullpen last season. The 28-year-old reliever was acquired off waivers last season from the Miami Marlins.