It's believed the woman was from South Dublin.
An Irishman is due before a Spanish court later following the violent death of his partner.
It's reported the 30- year- old man has links to the Kinahan Cartel.
The 36-year-old woman was found dead in her hotel in Salou on Sunday night.
It's believed she was a mother of two and from South Dublin.
Gardaí have travelled to Spain to help with the investigation and the repatriation of the victim's remains.

Over €2,000 Damage Caused in Vandalism at Athy Sports Ground
Weather Warning Issues Storm Dave Approaches Ireland
Fresh Blow For Metrolink As Programme Director Quits
Investigation Into Death Of Inmate In Portlaoise Prison
Intel Reclaims Control of Key Irish Chip Facility In Leixlip
€7m Worth Of Cannabis Seized In Athy
Budget 2027 To Take Place On October 6th
Kildare Gardaí See Increase In Drivers Taking Off Without Paying For Fuel, Whilst State Of The Nation Address Not Ruled Out By Taoiseach