The shooter who opened fire at Texas megachurch before they were killed by security officers was carrying an AR-style rifle, according to search warrant documents released by a prosecutor’s office on Monday.

The shooter was identified as 36-year-old Genesse Ivonne Moreno in an affidavit seeking a search warrant for a home in Conroe, about 40 miles (64.37 kilometers) north of Houston. The warrant was released by the Montgomery County district attorney’s office.

A motive for the attack at celebrity pastor Joel Osteen’s Lakewood Church that sent worshippers rushing for safety in between busy services on Sunday remains unclear.