A silent alarm alerted authorities of a break-in at a Sprint store in southwest Houston on Tuesday.

The alarm went off around 2:50 a.m. at the store on Westpark and Buffalo Speedway.

Investigators said the suspect or suspects broke a bottom window of the Sprint store to get inside.

The store manager was inside, according to investigators, but it was unclear as to what was taken.

When police arrived, the thieves were gone.