A 17-year-old man has been arrested after police discovered Class A drugs and a gun on a Mitcham estate.

Police raided a flat just off Western Road, Mitcham at 7am this morning and found the gun, cocaine and heroin, as well as evidence of supplying.

The teenager is being held at a police station while police analyse the drugs.

Sgt Steve Burke tweeted: "We have one man arrested and in custody. It's going to be a long day getting the drugs tested with the view to charging #safermitcham."