Detectives say the victim was killed after being stabbed with a broken bottle in the mens’ toilets at an unnamed Irish pub in the holiday resort of Fuengiriola.
The suspected killer is 49 and the dead man is 53.
The incident has been described as a surprise attack which occurred after the British man started pestering several women in the pub, including the partner of the man who was killed.
A spokesman for Spain’s National Police said: “National Police officers have arrested a 49-year-old British man in Malaga in the early hours of this morning over his suspected involvement in the death of an Irishman aged 53 at a pub in the town.
“The victim received cuts to his neck and other parts of his body with a broken beer bottle.
“The incident occurred around 1.50am in the toilets of the Irish pub.
“Police have established from inquiries that the victim and attacker didn’t know each other.
“According to initial inquiries, the suspect took an interest in several women inside the pub, including the partner of the victim.
“At one point the man who was killed spoke to the suspect.
“The victim was allegedly attacked by surprise in the mens’ toilets.
“The arrested man, who allegedly had two broken bottles in each hand, is suspected of inflicting several wounds on his victim, including some to the neck.