Alleged gun dealer charged after Vic siege

A Melbourne man is accused of supplying the shotgun used in the fatal apartment siege in Brighton.

The Gladstone Park man is the second alleged gun dealer to be charged following counter-terrorism raids across Melbourne's north in connection with the siege.

The 25-year-old was arrested on Monday and charged with dealing a firearm without a licence, possessing a firearm as a prohibited person and other offences.

Police say he supplied a weapon used by gunman Yacqub Khayre, who shot dead a hotel clerk during the siege in Brighton on June 5.

Khayre killed 36-year-old Nick Hao and took a woman escort hostage before opening fire at police, injuring three Special Operations Group officers.

The gunman died in a hail of police bullets, ending the dramatic incident at Buckingham Serviced Apartments.

Police later revealed Khayre had two shotguns at the siege, including a sawn-off shotgun used to fire at police.

Counter-terrorism police stormed five properties in Ascot Vale, Gladstone Park, Glenroy, West Meadows and Reservoir on Friday.

Ascot Vale man Kane Dalrymple, 30, was also charged with being an unlicensed gun dealer following the raids and he faced Melbourne Magistrates' Court on Saturday.

The court heard Dalrymple allegedly made use of "coded" text messages to ply his trade, including code words such as "bicycle" and "two-seater".

The Gladstone Park man was remanded in custody to appear in Melbourne Magistrates' Court on Wednesday.