A 25-year-old mother from Bristol fell to her death from a hotel balcony while on holiday with her ex-partner, their child and his parents in Tenerife.
Kerry Roberts reportedly fell from the 12th floor of the building in the resort of Adele on Friday morning.
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According to reports in Spain, a man was arrested but later released without charge.
ITV News reports that Roberts' death is being treated as suicide.
Her boyfriend Tommy Lane wrote on Facebook: "R.I.P babe I'm going to miss you so much my heart is with all your family that place you had in my heart is always going to be there. Fly high and proud with the angles I love you so much I'm so heart broken."
According to the Bristol Post, Ms Roberts fell onto a lawn and her body was found by a security guard at 2am. Emergency services were called but were unable to save her.
A Foreign Office spokesman said: "We are offering assistance to the family of a British woman who has sadly died in Tenerife."
A spokesman for Kerry's family told the Daily Mirror: "Kerry had sorted her life out. She was happy with her life. She loved her boyfriend Tommy very much."