Police in Northern Ireland have warned of the potential of dissidents launching attacks on their officers in Londonderry on Easter Monday.
Assistant Chief Constable Bobby Singleton said the force has received “strong” intelligence that dissidents are planning to launch terror attacks against officers on the bank holiday.
PSNI Chief Constable Simon Byrne said that officers would be moved to frontline duties to counter any potential threats, in a policing strategy that he said had not been used in years.
He said this reflected the “exceptional circumstances” ahead of this Easter weekend.
Speaking in Belfast, Irish deputy premier Micheal Martin condemned the threat of a terrorist attack as “criminality in its worst form” and said it was “very evil people who are contemplating this”.
Mr Biden’s trip, which will also include events in Dublin, Co Louth and Co Mayo, will have a strong focus on the 25th anniversary of the Good Friday Agreement, which falls on Easter Monday.
MI5 had recently raised the terrorism threat level in Northern Ireland to severe, meaning an attack is highly likely.
This followed the gun attack on senior detective John Caldwell in Co Tyrone, who has been left with life-changing injuries.
Police have blamed the New IRA for the attack.
“It’s going to be a really significant weekend for the PSNI,” Mr Singleton told a press conference in Belfast.
“There is also very strong community intelligence specifically coming forward in respect of Monday’s events in Derry/Londonderry and a real concern that there may be attempts to draw police in to serious public disorder and to use that then as a platform to launch terrorist attacks on police as well.
“So going into our operation that’s something that is very clearly right at the forefront of my mind, the minds of the commanders that will be delivering that and of course our officers as well.”
Easter Monday is the day dissident republicans traditionally mark the anniversary of the Easter Rising rebellion against British rule in 1916, with a parade set to take place in Londonderry.
“The intent remains the same. I think as I see it, it’s the risk, it’s the platform potentially, in particular, that public disorder may present,” he said.
“We don’t have to go too far back, sadly, to see precisely that kind of scenario playing out in Derry/Londonderry in the past.
“So that is absolutely something that’s in the mind of myself and the police commanders as we approach that event, and it will be something that we’ll have to keep under constant review depending on how things develop on the day.”
When asked about whether guns or explosives could be used to target police in Londonderry, Mr Singleton said: “We’ve seen that in the past and, on that basis, we have to be prepared for that and we will be prepared for all eventualities on Monday.”
“I would condemn any attempts by anybody to injure or to attack the PSNI,” Tanaiste Mr Martin said on Thursday.
“An attack on the PSNI is an attack on all of us on this island. The police are essential to the security of our people and the PSNI, in my view, are doing a remarkable job under very challenging circumstances.”
He added: “I was listening to PSNI personnel this morning talking about their work in communities.
“The tremendous progress that has been made in terms of the transformation of policing in Northern Ireland is one of the great dividends of the Good Friday Agreement.
“I’m resolute in my condemnation of such attacks, as we witnessed on John Caldwell.
“I think it’s very evil people who are contemplating this – this is criminality in its worse form.”
Briefing the Policing Board in Belfast, the Chief Constable said the overall tone in both the operational threat and the resourcing picture facing the PSNI is “stark and sombre”.
He said: “We are now dealing with a severe terrorist threat, which means that an attack is highly likely right across Northern Ireland.
“It will also include prison officers and military personnel.
“The style of attack that we are dealing with and trying to frustrate is gun attacks and bomb attacks on these people by a small number of determined dissident terrorists.
“What this means is that working with our security partners, there is an assessment about an increase in their intent and capability to cause serious harm to us in the next six months.”
Mr Byrne said the increased threat came at a time of “unprecedented policing demand” in Northern Ireland.
He said: “After careful assessment we have decided that in order to maximise the safety of our officers and staff and the wider community, it is necessary to increase our operational capacity immediately.
“In policing terms we have initiated what we call Operation Inspire level four.
“What that means is that in some cases operational officers across the service have moved to 12-hour shifts and officers in a number of non-frontline roles will move to support the collective effort to focus on preventing further terrorist outrage and actually increasing our patrol visibility across the country.
“It is a reflection of the quite difficult and exceptional circumstances we find ourselves in.”
Mr Byrne said the plan would remain in place for around 10 days and would then be reviewed.
The Chief Constable added: “If that wasn’t enough, we are on the cusp of the Easter period which is traditionally quite busy. There is a significant policing operation in place.
“There are 90 notified parades and events taking place between Good Friday and Easter Tuesday.
“In addition our planning is based on experience which takes into account the risk and likelihood of policing non-notified parades.
“We are also assuming attempts will be made to draw us into situations which may likely cause disorder over the next few days.”
PSNI Assistant Chief Constable Chris Todd said there was no specific intelligence that the anniversary of the Good Friday Agreement was acting as an additional motivation for dissident republicans to launch attacks.
“We plan for the worst and we hope for the best to be quite frank, we will respond to the intelligence as it develops, we have no such intelligence that would support that at the moment,” he said.