Laura Clark uses tweezers to show a piece of glass she says she found inside a Subway sub at her home in Peterborough on Tuesday, Jan. 22, 2013. (QMI Agency/CLIFFORD SKARSTEDT)

PETERBOROUGH, ONT. - An investigation by the Canadian Food Inspection Agency (CFIA) found no glass in a batch of lettuce that was sealed after a Peterborough woman claimed her daughter was injured when she ate about half of a six-inch Subway sandwich with broken glass in it last week.

Laura Clark said her three-year-old daughter, Aubrey, suffered cuts to her mouth and passed two pieces of glass after eating a sandwich at the north Peterborough Subway. She also claimed she found several pieces of glass in the remaining portion of the sandwich.

The Peterborough County-City Health Unit investigated and turned the investigation over to CFIA.