South Florida woman takes last known photo with officer killed in London attack

Staci Martin poses with Keith Palmer shortly before he was fatally stabbed

Staci Martin poses for a photograph with Keith Palmer while visiting Parliament. Less than an hour after this photo was taken, Palmer was killed.

PEMBROKE PARK, Fla. – A South Florida woman posed for what is believed to be the last photograph of a London police officer before he was killed in a terror attack outside Parliament.

Wellington resident Staci Martin was vacationing with her family in London during Wednesday's attack, which killed four people and the assailant.

Martin said on Facebook that she was walking past Parliament at 1:52 p.m. when she saw a police officer standing outside.

"I liked his funny hat so I asked him if he would take a picture with me," she wrote. "He obliged. He was very polite."

Less than an hour later, he was dead.

A man, identified by police as Khalid Masood, drove his car into crowds on Westminster Bridge before fatally stabbing a police officer on Parliament grounds. Masood was shot dead by police.

The officer killed was identified as Keith Palmer, who had posed for a photo with Martin shortly before the attack.

An American man from Utah, a British retiree and a British school administrator were also killed on the bridge.

More than 50 people of a dozen nationalities were wounded in the attack, 31 of whom required hospital treatment.

Martin and her family were not hurt.