PITTSBURGH — A 73-year-old man and his grandson have been arrested in a Pittsburgh drug raid after police say they found heroin bricks, drug packaging material and guns in a search of their home.

Police say they raided the home Friday morning after a three-month investigation by plainclothes officers.

They arrested Albert Martin and his 20-year-old grandson, Troy Martin. They say both will face drug charges, while the younger Martin also will face weapons charges.

A woman answering the phone at the Martin home says the men didn't do anything wrong.

Police say they found 24 bricks of heroin worth $12,000 and an ounce of cocaine worth $1,000. They also say they found two pistols with a 30-round magazine and $4,220 in cash.