The suspect accused of fatally shooting the chief executive of UnitedHealthcare has pleaded not guilty to 11 murder and terror charges.

Authorities say Luigi Mangione shot dead Brian Thompson as he was walking to an investor conference in midtown Manhattan on the morning of 4 December.

The 26-year-old was formally charged last week by the Manhattan district attorney with multiple counts of murder, including murder as an act of terrorism.

Mangione was detained in a Pennsylvania McDonald’s after a five-day search, carrying a gun that matched the one used in the shooting and a fake ID, police said.

He was extradited from Pennsylvania on Thursday and quickly rushed to New York City.

As well as this state trial, he also faces a federal charges. The two cases will proceed on parallel tracks, prosecutors have said.

Mangione is being held in a Brooklyn federal jail alongside several other high-profile defendants, including Sean “Diddy” Combs and Sam Bankman-Fried.