"We're facing a horrifying reality that our own student, a member of the Columbia community, has become a political prisoner here in the United States," Columbia University Professor Michael Thaddeus said in a statement.
Since 1977 only three people had died by firing squad, all three of them in the state of Utah. The last to die had been Ronnie Lee Gardner in 2010.Ahead of Sigmon's execution, anti-death penalty protesters held a rally outside the jail in the city of Columbia.
They held signs saying "all life is precious" and "thou shalt not kill".The state allows witnesses to observe the death from behind bulletproof glass, but the executioners are hidden from view to protect their identities.South Carolina passed a law in 2023 requiring that the identities of the execution team members remain secret.
Three Iranian men have been charged under the UK's National Security Act on suspicion of conduct likely to assist Iran.Mostafa Sepahvand, 39, Farhad Javadi Manesh, 44, and Shapoor Qalehali Khani Noori, 55 were arrested on 3 May.
The charges relate to a period between 14 August 2024 and 16 February 2025, police said.
Cdr Dominic Murphy, from the Metropolitan Police's Counter Terrorism Command, says the charges come following "a very complex and fast-moving investigation".and faces a sentence of more than 30 years in prison.
Speaking two years after the attack in 2024, Sir Salman said his eye was left hanging down his face "like a soft-boiled egg", and that losing it upsets him "every day"."I remember thinking I was dying," he said.
"Fortunately, I was wrong."Sir Salman said he used his new book, Knife, as a way of fighting back against what happened.