GB Boxing has confirmed several members of the British Lionhearts team witnessed part of Wednesday’s terror attack in Westminster, London.

A group of fighters, including Rio Olympians Muhammad Ali and Pat McCormack and experienced super heavyweight Frazer Clarke, was attending a community event at the Houses of Parliament when the tragic events unfolded.

Clarke posted a message about the events on his Instagram account. It read: “Yesterday a sad, sad day for everyone involved. My thoughts to everyone involved and their loved ones.

“A long day for me and the team but we are still here and will return to our loved ones. Others won’t. I appreciate the messages of concern but I’m fine and focused on tonight and getting my job done.

“Just a quick one to everyone; let’s not live in fear over the act of a crazy person. Let’s not judge others by this man’s actions. This isn’t down to religion, because this crazy act is by someone that has no faith at all.

“We are well looked after. I [have] seen it first hand, still the greatest city in the world and we should be proud of it. #londonGB #sticktogether.”

Members of the Italia Thunder boxing team were touring the grounds of Parliament when the lethal attack unfolded, describing the incident as a “truly horrible moment.”

The Italia Thunder were hurried into Parliament, where special forces carried out a security check amid unconfirmed reports there was a suspicious backpack in the building.

A statement from GB Boxing confirmed Thursday’s fixture against Italy will go ahead, stating: “The boxers and staff have spoken to the police and security forces and are assisting them with their enquiries into the incident.

“The boxers are due to compete in the World Series of Boxing against Italia Thunder and are very keen to fulfil this despite [Wednesday’s] events. The team is completely focused on preparing for the fixture and will not be making any further comment until after the match is over.

“The boxers, coaches and everyone connected with GB Boxing and the British Lionhearts would like to express their sympathies to everyone that was hurt in [Wednesday’s] incident and their sincere condolences to all of the families that have lost loved ones.”