STAMFORD - Stamford police are investigating two armed robberies that could be related.

Officers say the first robbery happened at the Family Grocery Store on Lockwood Avenue Friday night.

They say a man, wearing a ski mask, walked in waving a gun and took money from the clerk.

They say the second robbery happened at the Dunkin' Donuts on East Main Street early Sunday morning. In that case, a man wearing a ski mask and gloves entered with a gun and demanded cash.