Magistrate Edwina Grima is this evening conducting an on-site inquiry at the penthouse where two men suffered fatal stab wounds on New Year's Day.

The Magistrate and a team of police forensic experts were seen arriving at Falcon House at about 7.30 p.m., TVM reported.

Father-of-twins Duncan Zammit and Nicholas Gera died of multiple stab wounds in the early morning of January 1 in the former's penthouse.

On January 23 the police issued a fresh call for help from anyone who may have any information on the case as the motive remained unknown.

Assistant Police Commissioner Pierre Calleja told a press conference that no link had been established between the Zammit family, which was asleep in its bedroom when the incident took place, and Nicholas Gera, who entered their home.

He explained how Mr Gera had entered the penthouse from the door leading to the roof. There was no forced entry and the door may not have been locked.

The double murder was witnessed by Claire Zammit, Duncan's wife, who  phoned her father and the emergency services in quick succession.

Toxicological analysis and some forensic tests were to be carried out abroad.

The police said that some 35,000 phone calls and SMSs going back several months were analysed. The police also examined computer data and a number of people were questioned to find if there was any link between Mr Gera and Mr or Mrs Zammit. Travel patterns were also studied. No links, of any kind, including sexual, were found.

Neither did it result that Mr Gera was familiar with the penthouse. The penthouse was not ransacked.

The probable chronology established by the police was that Mr Gera grabbed a knife he found in the kitchen and attacked Duncan Zammit. The fight appeared to have started in the bedroom and continued in the corridor close to the bedroom. It was not known how long Mr Gera was in the penthouse before the stabbing.

Mrs Zammit was questioned several times by the police as a witness, not a suspect.

Prior to the incident Mr Gera was in a bar in St Julian's. He then went to another bar, returned to the first bar and subsequently went to another bar in Sliema, shortly before the incident. He appeared to have had an argument in Muddy Waters, the bar which he visited twice. The police have interviewed the people he had the argument with.