Gardaí have described as "brutal" the murder of a Polish national in his apartment in Letterkenny, Co Donegal this week.

The investigation into the death of 41-year-old Bogdan Michalkiewicz has been upgraded to that of a murder.

Mr Michalkiewicz, who had been living in Letterkenny for seven years, was found by his brother in his flat at 15 Westside Apartments, Lower Main Street, at around 11am yesterday morning.

It is believed he had been stabbed a number of times.

The entire apartment complex has been sealed off, and remaining residents have been rehoused.

Inspector Michael Harrison said that a post-mortem examination revealed that the man suffered a "brutal death."

He added that Mr Michalkiewicz had been in his apartment all weekend and was last seen alive in the vicinity of Lower Main Street on Monday afternoon.

Inspector Harrison appealed for anyone with information to contact them immediately.

He added that a Polish interpreter would be available 24 hours a day at Letterkenny Garda Station.

Letterkenny Garda Station can be contacted on 074-91-67100 or through the Garda Confidential Telephone line, 1800-666-111.