Tyrese Allegedly Hits Pregnant Girlfriend

Police are conducting a criminal investigation into allegations that singer-actor Tyrese Gibson punched his girlfriend, who is three months pregnant, TMZ reported on its Web site Thursday.

Police tell TMZ that the 28-year-old's live-in girlfriend claimed the two got into an argument early in the morning at their Los Angeles home and that paramedics responded after he allegedly struck her twice and left the scene.

TMZ says he was scheduled to call in to a Sacramento radio show on Thursday to chat about his latest film, "Transformers," but that never happened.

Tyrese's reps called the station before the interview was to take place and told the DJs he was "M.I.A.," TMZ reports.