A teenager who opened fire with a 9 mm pistol in his Nashville high school cafeteria fired a total of 10 shots within 17 seconds of entering the room, according to police.

Two teenage school shooters, Solomon Henderson and Natalie Rupnow, were linked through disturbing online interactions and shared extremist ideologies before carrying out deadly attacks at Christian schools a month apart.

CBS News reports that sources close to the investigation said authorities found evidence that Henderson and Rupnow were following each other’s social media accounts. However, there isn’t any evidence that the two suspects were in direct contact or communication with each other.

The 17-year-old gunman who carried out a deadly shooting at a Tennessee high school has been identified as Solomon Henderson.

The suspected gunman behind a deadly Nashville school shooting may have been in contact with another teen who opened fire at a Madison, Wisconsin school just last month, law enforcement sources told ABC News.