The police officer who lost his life in the London attack had 15 years of service and was a husband and father.
Keith Palmer, 48, was stabbed outside the Houses of Parliament in Westminster.
The UK Metropolitan Police Acting Deputy Commissioner and national lead for Counter Terrorism Mark Rowley, in a statement, said Palmer was a member of the Parliamentary and Diplomatic Protection Command.
“He was someone who left for work today expecting to return home at the end of his shift and he had every right to expect that would happen,” Rowley said.
Condolences for Palmer have been pouring in on social media, with many honouring his heroism.
Former UK Labour leader Ed Miliband wrote on Twitter, “We all mourn for PC Keith Palmer and send the deepest condolences to his family. He died protecting all of us at Westminster.”
London mayor Sadiq Khan said Palmer personified the brave men and women of the UK police and emergency services ‘who work around the clock to keep us safe’, as reported by The Evening Standard.
“Tonight all Londoners are grateful to them,” he was quoted as saying.
Meanwhile Rowley confirmed three civilians died in the attack, stating that specially trained family liaison officers would be deployed to support the families of the victims.
On the identity of the suspected attacker, Rowley only confirmed that the person was shot dead by an armed officer.
He said they were now working on the assumption that the suspected attacker was inspired by international terrorism.
The Parliament lock down has been lifted, according to Rowley.
“The UK threat level has been at Severe for some time and this level will not change. We have enhanced the scale of the policing operation to protect our communities across the country,” Rowley added.
The UK’s BBC earlier reported that the suspected attacker drove into people on Westminster Bridge before reaching the Houses of Parliament.
A total of five people died while some 40 others suffered injuries.