The youngest son of Michigan Rep. John Conyers was found safe Friday.

Carl Conyers, 21, is a student at the University of Houston. He was reported missing Tuesday afternoon by his roommate at their off-campus apartment, police said.

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Police said he was found safe at around 2:10 a.m. inside the apartment. It was not immediately clear where Conyers was during the week.

"Rep. Conyers has been in touch with his family and is happy his son is safe and uninjured," the congressman's spokesman, Shadawn Reddick-Smith, told Fox News. 

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Authorities said Conyers was taken to the University of Houston police department to be interviewed and then he was released to his family.

Carl Conyers' girlfriend, Daisha Lewis, told WWJ Newsradio 950 in Detroit that she was supposed to meet him on campus Wednesday, but that he never showed. When she and friends checked his apartment they found some clothes and other items missing.

Corey Gentry, a friend of Conyers, told Click 2 Houston that Conyers was displaying “unusual behavior.”

Congressional officials were monitoring the search. A senior House Democratic source told Fox News that they were "worried" about the younger Conyers and that the situation may be serious.

Released images of Conyers showed him with a beard, although investigators said he recently shaved it.

The 87-year-old Rep. Conyers, D-Mich., is the longest-serving member of the House. First elected in 1964, Conyers won his 27th term last week.

Fox News' Chad Pergram and The Associated Press contributed to this report.