Taylor Lewan and the Tennessee Titans are mourning after another school shooting took the lives of six people, including three children, in Nashville on Monday ... with the frustrated NFL lineman saying "this s*** has got to stop."
The horrific incident occurred around 10:13 AM when Nashville Police received a call about an active shooter at Covenant School, Covenant Presbyterian Church -- a Christian school for preschool to 6th-grade students.
Three students and three adults were killed in the attack.
"Officers entered the first story of the school, began clearing it," police said at the news conference.