Government Properties Income Trust, a Newton-based REIT, has commenced a public offering of 7 million shares.

The company said it expects to use the proceeds to repay portions of its $250 million revolving credit facility, and to fund general business activities, including possible future acquisitions.

The offering has not been priced yet.

Earlier this week, Government Properties Income Trust reported a $7.7 million second quarter profit, up from $5.9 million a year earlier.