Authorities in Texas are reportedly searching a home on Monday in the Houston area for clues as to why a shooter opened fire inside Joel Osteen’s Lakewood Church on Sunday afternoon before being killed by off-duty police officers at the scene. 

The property in Conroe, where investigators believe the shooter lived, is being looked over by members of the FBI, the Texas Rangers, the Montgomery County Sheriff’s Office and the Conroe and Houston Police Departments, according to KPRC. The shooter has not been publicly identified. Houston’s mayor, its police department and other agencies are scheduled to hold a 2:30 p.m. ET press briefing on the incident.

News of the search comes as witnesses are opening up about the chaos that erupted at the Houston megachurch shortly before its 2 p.m. Spanish service was set to begin yesterday. 

Christina Rodriguez, who was inside the church, told KTRK that she “started screaming, ‘There’s a shooter, there’s a shooter,’” and then she and others ran to the backside of a library inside the building, then stood in a stairway before they were told it was safe to leave. 

During a press conference, Osteen thanked law enforcement and said that he was “devastated” by the shooting.  

“We don’t understand why all these things happened, but we know God’s in control,” Osteen said. 

Texas Gov. Greg Abbott called the shooting “tragic.” 

“Our hearts are with those impacted by today’s tragic shooting and the entire Lakewood Church community in Houston,” Abbott said. “Places of worship are sacred.” 

Houston Police officers watch over displaced churchgoers outside Lakewood Church on Sunday following the shooting. (Karen Warren/Houston Chronicle via AP)

The motive for the shooting remains unclear. 

Fox News’ Andrea Vacchiano and The Associated Press contributed to this report.