LEIGH-ON-SEA, ENGLAND: A British lawmaker in Prime Minister Boris Johnson's Conservative Party was stabbed to death on Friday in a church by a man who walked into a meeting with voters from his electoral district.

David Amess, 69, who represents Southend West in Essex, eastern England, was stabbed at around midday at a meeting at the Belfairs Methodist Church in Leigh-on-Sea.

Armed police swooped in on the church and said a man had been arrested. Police said they were not looking for anyone else in connection with the incident.

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"He (Amess) was treated by emergency services but, sadly, died at the scene," police said.

"A 25-year-old man was quickly arrested after officers arrived at the scene on suspicion of murder and a knife was recovered."