A man has been arrested after allegedly grabbing an Australian journalist and hitting her in the stomach as she covered protests against police brutality in London.
Channel Nine Europe correspondent Sophie Walsh can be heard screaming live on-air and was visibly shaken when the camera cut back to her.
Appearing on Channel Nine's Today show on Thursday with camera operator Jason Conduit, Walsh said she was "pretty rattled still".
"Even just hearing the sound of my scream, I don't think anyone knows the sound of their true scream until they are in a situation like that where they feel that it's a life or death scenario," she said.
"I had this guy, random, come up behind me and grab me from behind ... He sort of started punching me with, the only way I can describe it, sort of stabby motions."
During the interview, Walsh said the man was "calmly" repeating "Allahu Akbar" during the attack.
Conduit used a light stand to chase and apprehend the man until the police arrived.
"You do what you gotta do, I knew he had to be stopped and the cops had to come eventually and fortuitously they did quite soon," he said.
Police officers found the man had a screwdriver and charged him with threats to kill and possessing an offensive weapon.
Walsh was broadcasting from a Black Lives Matter protest in Hyde Park on Wednesday morning, local time, when she was allegedly attacked.
A statement from Channel Nine said Ms Walsh was rattled but not hurt.

A man is arrested by police in London after assaulting an Australian journalist while she was live on-air. Source: Nine Network
Hours later, in a separate incident, Nine reporter Ben Avery was also confronted in an underground tunnel while he was broadcasting live to the Today show on Thursday.
"As you just saw there, the microphone was snatched out of Ben's hands. I'm pleased to say that Ben is OK," newsreader Alex Cullen said.
Earlier this week, Seven News reporter Amelia Brace and cameraman Tim Myers were assaulted by law enforcement while covering a George Floyd protest outside the White House in Washington.
The footage, broadcast on live on Sunrise, shows police in riot gear storming past before hitting the camera which then goes black.
Brace yelled "media" as law enforcement approached and both were located to the side of the main group of protesters and did not appear to be participating.