Google's profit grew roughly 36 per cent in the second quarter, even as spending at the Internet search leader continued to rise.

The firm's shares were up 11.7 per cent at $590.96 in after-hours trading following publication of its results.

Google posted net revenue, which excludes fees paid to partner websites, of $6.92 billion in the second quarter, compared with $5.09 billion in the year-ago period.

Net income in the second quarter was $2.51 billion, or $7.68 a share, up from $1.84 billion, or $5.71 a share, in the year ago period.

The company's operating expenses were up 49 per cent year-on-year at $2.97 billion.

Reuters