Robin Givens, the former star of "Head of the Class" and ex-wife of boxer Mike Tyson, struck and critically injured an 89-year-old woman who was crossing a busy intersection, according to published reports.

The actress, 39, was driving a Mercedes SUV in Miami on Wednesday when she hit Maria Antonia Alcover while the woman was crossing an intersection during rush hour, police spokesman Delrish Moss tells the Associated Press.

Moss said Alcover made it halfway across the street when the light turned green and Givens's car -- which was previously stopped at the intersection -- struck her. Alcover reportedly fell backward, nearly severing her foot, while Givens drove another 10 feet before witnesses flagged her down.

The actress, who reportedly was traveling with two boys (ages 4 and 10), got out and stayed with the woman until authorities arrived.

"She was very cooperative with police last night," Moss tells AP. "She was crying, extremely shaken up and very concerned about the well-being of the victim."

Moss said Alcover was in "extremely critical but stable" condition at Jackson-Memorial Hospital in Miami. He added, "We're looking at it as a pure accident and we don't expect any additional criminal charges whatsoever."

Givens was issued a traffic summons for failing to use due care when a pedestrian is in the crosswalk. AP's calls to her Los Angeles-based manager, Alan Iezman, weren't immediately returned.

Although she studied classical acting, the New York-born Givens has had a sporadic career on-camera, including "Head of the Class" and the 1992 Eddie Murphy comedy "Boomerang." Givens's most recent performance was in 2003's TV movie "Hollywood Wives: The New Generation," in which she played the soul-singer friend of Farrah Fawcett's character.

She married Tyson in 1988, but the much-discussed union ended a year later. In 1997, she wed her tennis instructor, Svetozar Marinkovic, though that too proved to be a short union.