A law enforcement official says Texas authorities have at least one person in custody in connection to the Lone Star College campus shooting in Houston, and local authorities think there could potentially be a second shooter.

The official spoke on condition of anonymity because he was not authorized to discuss an ongoing case. The official says multiple injuries have been reported.

The Houston-area community college is on lockdown amid reports of a shooter on campus. Lone Star College System issued an alert on its website telling students and faculty to take immediate shelter or avoid the campus.