A 51-year-old man has admitted sending threatening messages to MPs, including former cabinet minister Nicky Morgan and Labour politician Yvette Cooper.
Jarod Kirkman admitted sending threatening and racially aggravated messages to seven politicians between December 4, 2018 and January 21 this year.
He pleaded guilty to seven charges at Westminster Magistrates' Court today, police said.
Kirkman reportedly set up a "fake email address" to send the threats, but was tracked down by officers.
The charges state that Kirkman sent a threatening email to Labour MPs Ms Cooper and Jenny Chapman, Conservative Ms Morgan, former Tory Nick Boles, as well as Sarah Wollaston and Heidi Allen of the Independent Group.
He also pleaded guilty to a charge of racially or religiously aggravated intentional harassment against Labour MP David Lammy.
Investigating officer Detective Inspector Craig Laws said: "We have a duty to take all threats seriously, including those made to Members of Parliament.
"It is never acceptable for someone to be threatened for doing their job and we're pleased Kirkman has admitted to committing the offences."
Kirkman is due to be sentenced at the same court on April 18.