Police sources have said the community response and appeals to dissidents to end their violence have had no impact.
A source said intelligence information suggested dissidents have continued to target officers since Mr Kerr was killed on Saturday.
“There is nothing to suggest a lessening of operational tempo, there has been no diminution of activity,” the source said.
Meanwhile, a “long and complex operation” is underway in Newry as British Army bomb experts continue to examine a suspicious van abandoned at an underpass on Thursday night. The Belfast to Dublin road is closed in the area, as is the Newry to Dundalk rail link.
And, from the UTV report
Meanwhile, two alerts in Lurgan have both been declared hoaxes.
A controlled explosion was carried out on a suspicious device discovered at the gates of a school of St Paul’s Junior High School in Francis Street in Lurgan on Friday morning.
A number of homes were evacuated.
A controlled explosion was also carried out on a suspicious object in the Castle Lane Mews area of the town.
Additionally, according to the RTÉ report
Elsewhere, the PSNI is responding to two security alerts around Strabane in C Tyrone.
One is near the town’s police station and another on the Strabane to Omagh road.
Adds This, on the other hand, is ‘news’
In a further development, it has emerged that, just 24 hours before the fatal car bomb blast in Omagh, police had ordered a specialist team of detectives to begin sifting through evidence from historic dissident attacks in a bid ramp up the pressure on the terrorists.
The cold case review will see exhibits analysed using the latest fingerprint recognition technology and Low Copy Number (LCN) DNA forensic techniques.
The team’s work is being funded directly by the additional £245m (€277.4m) secured by the PSNI from the Treasury and Stormont Executive to tackle the dissident threat.
High-ranking security sources revealed the additional investigative tactic against the wider dissident movement as two men arrested on suspicion of Pc Kerr’s murder continued to be questioned.
The review will examine specific crimes detectives believe may have involved present-day dissidents.
While the specialist detectives will probe crimes dating back to the 1980s and 1990s, the principal focus will be on a series of incidents around the turn of the 21st century. [added emphasis]
It is understood one is the Real IRA murder of a civilian building contractor at an Army base in Limavady, Co Derry, in 2002.
David Caldwell, 51, died when he picked up a booby-trap bomb hidden in a lunchbox at the TA base.
However, the team will not confine its work to terror acts and every facet of suspected dissidents affairs will be examined, from past financial dealings to potential involvement in other crimes.
“We hope to engender a state of paranoia among the dissidents,” said another police source.
“Make their lives as uncomfortable as possible.”