Manhunt launched as arrest made in Enfield fatal shooting
Detectives are urgently appealing to the public for help in connection with the shooting.
Detectives are urgently appealing to the public for help in connection with the shooting.
The men, who are in their 30s, were arrested on suspicion of offences under Section 41 of the Terrorism Act 2000.
Police have launched a murder investigation and are carrying out urgent enquires.
The defendants fled to Wales and Spain following the attack on Gregory, but determined officers were able to trace them and return them to England to face justice.