A B.C. man probably wishes he had given his 11-month-old son a set of keys to play with instead of a phone, after the infant accidentally dialed 911 and brought police to his dad's marijuana grow-op.

Mounties say a 911 call came in from a residence in White Rock, B.C., on Friday morning, but whoever was on the other end of the line hung up.

Officers arrived at the residence, and after numerous knocks on the door went unanswered, they entered the home.

"The gentleman was quite surprised," said White Rock RCMP Const. Janelle Canning.

She said the 29-year-old man, startled by the sudden sight of police, insisted he hadn't made the call.

When it was suggested a child might have dialled, the father objected and said his son was far too young.

That's when police spotted the baby boy, phone in hand.

"We saw him playing with the cordless phone and just pressing all the buttons, so evidently he had called 911," Canning said.

With that mystery solved, officers began inspecting the residence and soon discovered a 500-plant marijuana grow-op.

The father was arrested and will appear in court in early April on charges of production of a controlled substance and mischief.

The boy was removed from the home by the Ministry of Children and Family Development, though he was later released into his mother's custody.

The mother does not live in the residence and had no idea what was going on at the home, Canning said.