Police who have stepped up their search for a wanted man say that traveller sites in Hertfordshire are an area of focus for their investigation.
Francis O’Donoghue is suspected of the attempted murder of two of his neighbours on the border of London and Essex on Tuesday, August 27.
The two victims suffered gunshot wounds to their legs and chest and are now recovering after surgery.
Detectives are investigating the possibility that Mr O’Donoghue, 27, may be hiding out with friends or relatives at traveller sites in Herts, Essex or London.
Essex Police have received calls from people who have seen the police appeals across the region and on social networking sites. The force is maintaining a daily liaison with Herts Police.
Supt Trevor Roe from the Essex force said: “Francis O’Donoghue has now been elevated to the force’s number one priority arrest.
“He is wanted for the attempted murder of two men and is potentially in possession of a handgun so everyone can see the necessity for him to be taken off the streets. With this in mind, we need the community’s eyes and ears and urge them to call us with sightings so that we can act on the information and get him in.
“The support we have so far received from the public has been fantastic and they are providing us with leads so we thank them, but urge them to continue with the calls.”
Mr O’Donoghue is described as white, around 5ft 11ins tall, of medium build, has short brown hair and protruding ears and speaks with an Irish accent. People should avoid any physical contact with Mr O’Donoghue but anyone who sees him is urged to call police immediately on 999.