Det Ch Insp John Caldwell, 48, suffered life-changing injuries in the attack in Omagh on 22 February.

Police believe the dissident republican group the New IRA was behind the attack.

On Thursday, the PSNI said he had left hospital to continue his recovery.

"We would ask that John and his family are given privacy at this time," a spokesperson said.

A total of 15 people have been detained during the investigation into the attack.

Police have previously said they were "working relentlessly to bring those responsible to justice".

On Thursday, the Police Federation for Northern Ireland said DCI Caldwell's discharge was "wonderful news".

"A long road to recovery ahead so we reiterate the appeal to give the Caldwell family the peace and privacy they deserve," the organisation said.

Meanwhile, Northern Ireland Secretary Chris Heaton-Harris wished Mr Caldwell and his family "the very best as his recovery continues".

DCI Caldwell was attacked while putting footballs into his car after coaching young people at football.

The shooting, which occurred in front of school children, has been widely condemned by political figures across Northern Ireland.

'We can't go back'

Last week, Prime Minister Rishi Sunak visited Mr Caldwell in hospital.

Speaking at an event to mark the anniversary of the Good Friday Agreement on Wednesday, the prime minister described the officer as a man who had "dedicated himself" to peace-building.

"A policeman, a father, a husband, a children's football coach - DCI John Caldwell," Mr Sunak said.

"We sat together and talked about the society he loves and about his ordeal. He told me: 'We can't go back'."

Who is John Caldwell?

Det Ch Insp Caldwell, who has been a police officer for 26 years and is from County Tyrone, is one of the best-known detectives in the Police Service of Northern Ireland.

He has led high-profile inquiries into murders, organised crime and dissident republicans.

BBC News NI understands Mr Caldwell had received a number of threats in the past and was aware his investigations relating to dissident republican attacks - including the killing of Lyra McKee in 2019 - made him a high-profile target.

Mr Caldwell had also investigated the murder of police officer Ronan Kerr near Omagh in 2011.