Police have released updated photographs of an American woman last seen in downtown Toronto on Oct. 22.

April Burkle, 34, flew to Toronto from Houston on Oct. 10 to meet a friend, family spokesperson Alexis Cauthen told the Star earlier.

Burkle was severely injured in a 2014 Arkansas tornado that killed her two children. Cauthen said Burkle suffers from PTSD and that “something may have gotten triggered when she was on the plane.”

She told the Star that Burkle visited a Toronto police station on Oct. 21 with 44-year-old Troy Warner, who left a psychiatric facility without permission.

Burkle then left the station after interacting with police, Cauthen said, and slipped back out into the city. Police said that Burkle was last seen on Oct. 22 in the area of Peter Street and Queen Street West.

Police said in their release Thursday that they are concerned for Burkle’s safety, and released updated photographs of her.

Burkle is described as five foot five, 140 pounds, with a medium build, long brown hair and brown eyes.

With files from Ted Fraser

David Venn is a breaking news reporter, working out of the Star's radio room in Toronto. Follow him on Twitter: @davidvenn_