Amazon Web Services scooped up another security startup, Sqrrl, for an undisclosed price.

Sqrrl CEO Mark Terenzoni confirmed the acquisition on the five-year-old company’s website: “We’re thrilled to share that Sqrrl has been acquired by Amazon. We will be joining the Amazon Web Services family, and we’re looking forward to working together on customer offerings for the future.”

Neither company immediately responded to requests for comment.

Axios reported in December that the public cloud giant was in talks to buy Sqrrl in a deal worth more than $40 million. The startup spun out of the U.S. National Security Agency (NSA).

The Cambridge, Massachusetts-based company raised $26.5 million in three rounds of funding, according to Crunchbase. Spring Lake Equity Partners led a $12.3 million Series C round in June 2017.

Sqrrl’s software helps security analysts to hunt and investigate threats, according to its website. Its Threat Hunting Platform uses big data technologies including link analysis and machine learning to let analysts visually investigate unusual activity in their data.

Co-founders Ely Kahn and Oren Falkowitz previously worked for the U.S. federal government. Kahn was director of cybersecurity at the national security staff in the White House. Falkowitz, who worked for the NSA, is now CEO of Area 1 Security, another security startup he co-founded in 2013.

The acquisition comes as AWS works to beef up its security services. In August, the company debuted Macie, a tool that uses machine learning to automatically protect data in the cloud. AWS acquired the security technology from another startup, harvest.ai, that it purchased for a reported $20 million in January 2017.