ConocoPhillips quarterly profit flat, output up

(Reuters) - ConocoPhillips, the largest U.S. independent oil and gas company, on Thursday reported a flat quarterly profit as higher costs offset an increase in oil and gas production.

Income in the second quarter was $2.1 billion, or $1.67 per share, compared with $2.1 billion, or $1.65 per share in the year-ago period.

The Houston company's oil and natural gas output from continuing operations was 1.56 million barrels oil equivalent per day (boed) in the quarter, up from 1.51 million boed a year earlier.

(Reporting by Anna Driver; Editing by Dale Hudson)