Google to stop radio ads in May

Move will lead to as many as 40 layoffs

Google said Thursday that in May it will stop selling ads on broadcast radio stations this spring, marking the Internet search leader's latest flop in off-line media. As many as 40 workers could be laid off.

Google expanded into broadcast radio three years ago with the purchase of dMarc for $120 million. The company could have been obligated to pay an additional $1 billion if financial targets had been hit.