Police said a 25-year-old man was arrested for murder after an attack on Leonsea’s church.
They recovered the knife and said they weren’t looking for anyone else in connection with the incident.
“Our heart is full of shock and sadness,” said Prime Minister Boris Johnson about the loss of “one of the most friendly people” in politics.
Sir David, 69, has been an adjutant since 1983, and he married five children. Obituary: Sir David Amess
Sad people: David Amess was my best friend
Sir David “adopted good legal records to help the most vulnerable people,” Johnson said.
Health Minister Sajid Javid said he was “a wonderful man, a good friend, and a good agent who was killed while performing his democratic function.”
Sir David, who represents Southend West, conducted a member operation at the Belfair Methodist Church in Eastwood Road North where voters could meet with members of parliament and discuss their concerns. Essex police said they had received reports of a knife stabbing and injuring a man shortly after BST 12:05.
Sir David is the second member of parliament to be assassinated in the last five years after the assassination of MP Jo Cox in 2016.
She was killed outside a library in Burstour, West Yorkshire, where she was to undergo surgery on a member.
Who was Sir David Amess? Sir David, a conservative supporter for almost 40 years, joined Congress in 1983 on behalf of Basildon.
He held a seat in 1992, but was traded to the nearby Southend West in the 1997 elections.
Growing up as a Roman Catholic, he was a social conservative and politically known as a prominent anti-abortion and animal welfare activist.
He was also known for defending the South End and included a long campaign to gain city status.
Southend councilor John Lamb told the BBC that Sir David had moved operations to various parts of the constituency “to meet people” and that the attack was “absolutely evil.” “We have lost the very talented and hard-working voters who worked for everyone,” he said.
Father Jeff Woolnow, a pastor of the nearby St. Peter’s Catholic Church, told the BBC:
“He died by doing this, it’s unusual. He died to serve people.”
Another priest, Father Kevin Hale, said there was “great distrust” about the attack.