Transcript for Holiday shoppers erupt in panic in London

Police on alert at shopping malls all across the country this Black Friday. Police say two men were wounded shot and stabbed during a fight outside of a mall in Houston today. Officers also responding twist here at a shopping mall in South Florida the mall evacuated the security supervisor says it was a false alarm. And holiday shoppers in roping in mass panic in London. Reports of gunfire causing a stampede in Central London hundreds of flight people voting for safety and a busy shopping district. The incident revealing a nervous city on edge after a series of terror attacks this year ABC's get a practice and is in London. They report of shots fired near a popular subway stop tonight. Also creating panic on London's busiest shopping street. Transport police tweeting officers are responding to reports of an incident at Oxford Circus station. On the ground people fleeing this woman reporting as she runs for cover. Police responding as if the incident is terrorism. Transportation officials are urging people to avoid the area. Heavily armed police officers could be seeing checking Oxford Circus station in nearby stores one person transported to a trauma center. Fifteen others suffering minor injuries an hour after the incident police giving the all clear. They're now looking for these two men they say may have had no altercation that's sparked the scare. There's still no word on what caused a scare but with Ford terror incidents in London this year alone. This city is on Ed.

This transcript has been automatically generated and may not be 100% accurate.