Google Inc suffered a service outage on Friday that briefly took down Gmail, the email service used by hundreds of millions of people and many businesses across the globe. Google, which first acknowledged the outage at 11:12 a.m. Pacific Time (1412 ET), said a little over an hour later that the problem with Gmail had been resolved. As of late Friday, the company did not offer an explanation for the outage, which affected users in at least India, Britain and the United States and prompted a stream of complaints on Twitter from users in many more countries. Were investigating reports of an issue with Gmail.