MOUNTAIN VIEW -- Google suffered a disruption to its widely used Hangouts chat service for roughly three hours Monday morning, the second time in less than two months the Web giant's popular email and instant-messaging offering has crashed.

Users began to notice issues with Google Hangouts just after 9 a.m. Pacific time, and by 9:30 Google had listed Google Talk and Google Hangouts as suffering "service disruptions" on its Apps Status Dashboard, a lesser categorization than "service outages." Some users said Drive, Google's cloud storage and office-applications suite, was also offline, but Google added only one component of that offering -- Sheets, its spreadsheet service -- to the list of affected services.

Google said that service was restored to some users by 11:15 a.m. and all users before 12:30 p.m. Pacific time.

"We apologize for the inconvenience and thank you for your patience and continued support," a statement on the Apps Status Dashboard at 12:28 p.m. read. "Please rest assured that system reliability is a top priority at Google, and we are making continuous improvements to make our systems better."

Google earlier declined a request for additional comment, directing media to follow updates on the Apps Services Dashboard.

Google webmail offering Gmail and its Google+ social network, the main homes for Hangouts, went down Jan. 24. Google said later that most users were affected for less than 30 minutes in that outage, while about 10 percent were without access for almost an hour.

In a blog post after the January outage was resolved, Google engineering executive Ben Treynor said that an internal process had hit a bug, causing an "incorrect configuration" to spiral across its network.

"The issue has been resolved, and we're now focused on correcting the bug that caused the outage, as well as putting more checks and monitors in place to ensure that this kind of problem doesn't happen again," Treynor wrote later on the day of that outage.

Google has been building up its professional offerings to challenge Microsoft's dominant enterprise offering of the Office productivity tools and Outlook email program, offering paid versions of its free Web-based suite to corporations.

Google's non-advertising revenues more than doubled in 2013, from $2.35 billion to $4.97 billion, but attributed that growth in its annual report to sales of digital content through its Google Play store and direct sales of hardware products, such as Nexus tablets and Chromebooks. The total was still less than 9 percent of Google's total 2013 revenues of $55.55 billion, excluding Motorola Mobility.

Contact Jeremy C. Owens at 408-920-5876; follow him at Twitter.com/jowens510.