A post mortem on the body of an architect who died six days after he alleged he struck on the head during an altercation outside his office in Drogheda has proved inconclusive.

The post mortem was carried out by State Pathologist Marie Cassidy today in the City Morgue in Dublin following the death of the 53-year-old who has been named locally as Deepak Abbi.

Further examinations will now be carried out to establish the cause of death, which could take a number of weeks to ascertain.

Mr Abbi called Gardaí on Thursday, telling them that he had been involved in an altercation with a number of youths; one of who he alleged had struck him on the head. However, it is understood that Mr Abbi did not make a formal complaint in relation to the incident.

Mr Abbi fell ill on Saturday at which point he was taken to Our Lady of Lourdes Hospital, Drogheda before being moved to Beaumont Hospital where he died on Monday afternoon.

Gardai today renewed their appeal for information surrounding the altercation which occurred at around 2.30pm on Thursday at the junction of Bessexwell Lane and Shop Street, Drogheda, near the offices of Mr Abbi's business premises, Abbi and Associates.

Gardaí said tonight that a number of witnesses had already come forward and were assisting gardai with their enquiries. An incident room has been established at Drogheda Garda Station and the investigation is ongoing.

Those with information are asked to contact Drogheda Garda Station 041 9874200 or the Garda Confidential Line on 1800 666 111.