NEW HAVEN, Conn. — Investigators searching for a Yale graduate student who disappeared days before her wedding reviewed security-camera footage and checked the blueprints of the building where she was last seen as the university offered a $10,000 reward for information leading to her whereabouts.

More than 100 local, state and federal law enforcement personnel were involved in the investigation into Tuesday’s disappearance of Annie Le, said Yale spokesman Tom Conroy.

Investigators were examining footage from some 75 cameras on and around the building where Le was last spotted. They did not immediately find any footage of her leaving the building.

“They are going frame by frame, looking at every image,” Conroy said.

There continues to be no evidence of foul play, Conroy said.

Le, 4-foot-11 and 90 pounds, wrote a magazine article earlier this year about how to stay safe around the Ivy League campus.

The article, titled “Crime and Safety in New Haven,” was published in February in a magazine produced by Yale’s medical school.