A teenager shot dead in a hail of bullets by two men at an airport terminal in Brazil was killed in a gangland execution motivated by love rivalry over a woman, police claim.

The horrific moment was captured on surveillance cameras as investigators revealed they arrested one of the suspects after he was found shot in the leg hiding in a house and in possession of the gun allegedly used in the murder.

The 18-year-old victim, Marlon Roldan Soares, was in Terminal Two at Salgado Filho International airport in Porto Alegre, south Brazil, with his family to see off a friend who was about to catch a flight, when the incident occurred.

Detective Adriano Melgaço said the youngster, who was killed on his 18th birthday, was hit at close range by least 17 bullets. The gunmen escaped in a getaway car.

Mr Melgaço said: ‘The crime was characteristic of an assassination, as all the shots were fired at close range.’

While under police guard the accused allegedly admitted he was responsible for killing Soares ‘because he was in a relationship with his ex-girlfriend.’

Detective Cassiano Cabral told O Globo: ‘It was a crime of passion. He wanted to kill Marlon.’

While Cleber Müller, a ballistics expert at the General Investigations Institute (IGP) added: ‘We found about 20 unexploded capsules and twenty triggered casings. The vast majority of the victim’s injuries were in the upper part of the body.’

In the video, a distraught friend of the victim is seen sobbing over the dead boy as officials cover up the body lying on the floor.

According to police the killing was a crime of passion carried out by drug trafficker, Diego da Silva Severo, 25, who objected to Soares dating his ex-girlfriend.

Officers believe the unidentified woman had been banned from seeing anyone outside her former-boyfriend’s faction. Soares did not have a criminal record and was not linked to drug trafficking.

The woman, was said to have been in a relationship with the victim but was seen by witnesses with the murder suspects at the airport moments before the shooting.

Police think the woman was with Soares’​ assailants to help them identify their target. However, she does not appear in the​ footage released by investigators.