Gardaí are appealing for the public's help on two, unrelated missing person's cases from the Dublin area.

Karen Joseph Holland (35) has been missing from Lucan since Monday morning.

Undated photo of Karen Joseph Holland | Image: Garda press office

Mr Holland is described as being approximately 5'6'' tall, with short brown hair and a beard.

When last seen he was wearing a hi-vis, below-waist workman's jacket and/or a camouflage jacket, blue jeans, a t-shirt and black runners.

He was carrying a blue/black backpack.

Mr Holland's parents are concerned for his safety.

Anyone who has seen him - or who can assist in locating him - is asked to contact Lucan Garda Station on 01-6667-300, the Garda Confidential Telephone Line at 1800-666-111 or any Garda station.

Separately, Gardaí are trying to locate 15-year-old Nadine Walsh, who is missing from the Clontarf area since March 7th.

Undated photo of Nadine Walsh | Image: Garda press office

Nadine is described as 5' 4'', of slim build with brown hair and brown eyes.

When last seen Nadine was wearing a school uniform - which was a white shirt, grey skirt and black bubble jacket.

Anyone with information is asked to contact Raheny Garda Station on 01 666-4300, the Garda Confidential Line at 1800-666-111 or any Garda Station.