Nest vice president of technology Yoky Matsuoka and Dropcam CEO Greg Duffy both left the company last week, according to The Verge.

Google acquired the home automation company for $3.2 billion last year as part of its plan to expand its collection of products and services while letting Nest continue with the innovation of home devices to make them more handy and intuitive. Dropcam, on the other hand, was acquired for $555 million last year as well. These two companies have been working together since for the integration of camera products to home appliances that will be launched this year.

Matsuoka left the company for an unspecified role with Twitter, and Duffy plans to pursue other opportunities. The source believes that it was the culture clash between Nest and Dropcam that drove these two popular employees to head out.

An anonymous source at TechCrunch said that Duffy was not on good terms with Nest CEO Tony Fadell before he left. The employees are disappointed too that they were asked to work on Saturdays until April or May for the new product dubbed as the "Quartz."

"Place is in shock and disbelief," the source said.

With the two high-level executives out of the company, Nest decided not to replace them. Instead, it chose to do a major reorganization among product groups to keep the roadmaps more aligned, based on the two memos obtained by TechCrunch.

Nest refused to comment on the news.