A second man has been arrested in connection with the murder of Constable Ronan Kerr in Northern Ireland.

The 40-year-old man was held when a car was stopped on a road between Omagh and Ballygawley in Co Tyrone on Thursday morning.

Meanwhile, the PSNI are today continuing their questioning of a construction worker who was held in West Dunbartonshire and taken to Northern Ireland in connection with Saturday's murder of PSNI officer, Ronan Kerr.

Police said the arrest was linked to a weapons find in the Coalisland area of east Tyrone on Tuesday evening.

The man was held in Renton in West Dunbartonshire yesterday and is said to have been working in the building trade in the area.

He is now being questioned at Antrim PSNI station.

Last night, the Assistant Chief Constable of Strathclyde Police, George Hamilton, said the arrest was made at the request of the PSNI.

"Needless to say we were acting in support of them at their request, and given the tragic circumstances leading up to this, we were happy to do this, and to make the arrest on their behalf under the terrorism act," he said.

Also yesterday, PSNI Assistant Chief Constable Drew Harris, said the weapons were found on Tuesday night inside stolen cars in a garage at Mountjoy Road in Coalisland.

The weapons included four rifles, detonators, component parts for rocket launchers, incendiary bombs and explosives, possibly Semtex.

"Everyone in Northern Ireland is very much safer today because these munitions have been taken out of circulation," he said.

Police have confirmed that the arms found in Coalisland will be forensically examined to establish whether there is a direct link to the Ronan Kerr murder or to the wider activities of dissident republicans.

Commenting on the seizure, local MP Martin McGuinness said: "It is clear from the murder of Ronan Kerr at the weekend that there are still small unrepresentative armed groupings out there who are seeking to undermine the progress of recent years.

"Like every other sensible person out there I welcome the removal from our community of this significant quantity of weaponry which these groupings were obviously intending to use to undermine the peace process," commented the senior Sinn Fein politician, life-long republican and outgoing Stormont Executive Deputy First Minister.

Also locally, Ian McCrea, DUP representative for Mid Ulster and member of the NI Policing Board, welcomed the discovery of a significant cache of terrorist weaponry in his constituency.

"Everyone in Northern Ireland is absolutely determined that those who want to drag us backwards in to violence, death and bloodshed will not be allowed to succeed.

"The entire community, with the exception of a tiny minority of criminal fanatics, want stability, security and peace.

"I am pleased that the police have discovered a significant cache of weaponry in Coalisland.

"From the information available it is clear that these weapons were intended for use by terrorists," he said.

"People in Mid Ulster and indeed throughout the rest of the community, are safer as a consequence of this discovery: the fewer terrorist weapons in circulation the better.

"I congratulate the PSNI in their efforts to stamp out criminality and terrorism in our community.

"We must all work to build a better society free from terrorism and criminality."

Meanwhile, just hours after the under-car booby-trap bomb victim was buried, the NI Secretary of State Owen Paterson has said that the funeral oration by Cardinal Brady sent a "clear and powerful message" to anyone even thinking that violence could possibly be justified.

Speaking after attending the funeral of PSNI Constable Ronan Kerr, Mr Paterson said: "This was a deeply sad and moving occasion, but it was also uplifting.

"So many people from across Northern Ireland and beyond came together not just to show support for Ronan's family but as a physical manifestation of the heart felt desire for a complete and final end to violence," said the Secretary of State.

"Cardinal Brady's words were immensely powerful when he commented that the killing of Ronan Kerr, was totally unjustified."

Agreeing that it was "an evil deed, an offence against God and a complete rejection of the belief that human life is sacred" Owen Paterson urged NI to heed the senior cleric's words.

"In God's name stop - and stop now!"

(BMcC/GK)