UPDATE 1-Hanover Insurance posts Q3 loss

* Q3 loss/shr $1.21

* Property & casualty pre-tax segment income falls 84 pct

Oct 30 (Reuters) - Insurance holding company Hanover Insurance Group Inc (THG.N) posted a quarterly net loss, hurt by a slump in property and casualty income and investment losses.

The company reported third-quarter net loss of $61.8 million, or $1.21 a share, compared with a profit of $53.9 million, or $1.03 a share, a year earlier. [ID:nWNAB5435]

Net loss included net realized investment losses of $52.8 million, or $1.04 per share. Total property & casualty pre-tax segment income slumped 84 percent to $13.8 million, hurt by catastrophe losses. [ID:nPnNETH094]

Shares of the company closed down 1 percent at $35.70 Thursday on the New York Stock Exchange. (Reporting by Supantha Mukherjee in Bangalore; Editing by Deepak Kannan)