Arlington police are on the scene at NorthPointe Baptist Church on Brown Boulevard, where at least one person is dead and one is injured.
Police responded to a call an assault in progress at the church about 4:15 p.m., according to a police website.
NorthPointe is satellite campus of First Baptist Church in Arlington.
According to WFAA's website, police said the suspect or suspects in the case may have fled the scene in the female victim's car, which was missing from the scene.
The vehicle is a four-door, cream-colored 2007 Mitsubishi Galant. The license plate number is DFR-352.
Police have asked that anyone who spots the car alert authorities and not approach anyone inside the vehicle.