PORTSMOUTH, N.H. -- A New Hampshire day care centre has been removed from "Pokemon Go" after complaining to game's developers about strangers lurking around the property.

The Little Blessings Child Care Center director Diane Lewis sent a letter to parents and the day care's two dozen employees explaining that she had seen many random people in the day care's parking lot and walking the grounds since the game launched last month.

The Portsmouth centre appeared as a "gym" in the game. Lewis got in touch with game developer Niantic Labs and had it removed.

She says Little Blessings' presence in the game was a safety concern and she's glad it has been dropped.