The FBI agents collected the cell phone of the gunman, who killed 26 people in a shooting rampage in a Texas church, but have yet to access it, said Christopher Combs, FBI special agent in charge, on Tuesday.

Combs said during a press conference outside the church in Sutherland Springs, the US state of Texas, "we will know more when we are able to explore his phone," adding the gunman is not in the FBI database, Xinhua reported.