Amid London chaos, MP rushes to victim's aid

Updated 7:08 PM ET, Wed March 22, 2017

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(CNN)There was an unexpected face among the first responders to Wednesday's attack near the House of Parliament in London. Tobias Ellwood, a Conservative Member of Parliament, was seen tending to a man lying outside of Westminster Palace.

Surrounded by a throng of police officers and emergency personnel, Ellwood was seen crouching on the cobblestone street applying pressure to the bare, bloodied torso of the victim. The man the politician was trying to save was a police officer who died, a witness on the scene told CNN. The witness asked not to be named, citing details that are now under police investigation.
Authorities identified the deceased officer as Keith Palmer, 48, a 15-year veteran.
Press Association photojournalist Stefan Rousseau captured the moment.
A few yards away, another person was also receiving medical attention as law enforcement enveloped the premises. Armed police were called in to assist in the situation, which is being described by the British government as a "terrorist incident until we know otherwise."