The Texas Department of Public Safety evacuated protesters from the Texas Capitol on Tuesday after a reported possible threat against lawmakers closed the building and surrounding grounds.

The Texas State Capitol was cleared of visitors Tuesday evening and closed to the public after a social media threat, the Texas Department of Public Safety said in a statement.

After Democrats returned to the Texas statehouse, Republican leadership assigned law enforcement officers to monitor them to prevent further delays to their plan to redraw congressional voting districts to favor Republicans ahead of the election.

Parts of the Texas Capitol were evacuated on Tuesday evening following reports of an active shooter threat. The Texas Department of Public Safety (DPS) said the evacuation, which happened at around 6:30 p.m., was prompted by a threat posted online.

Parents of the young girls who died at Camp Mystic will testify about camp safety on Wednesday as the Texas special session continues. They will appear at a joint committee hearing focused on identifying what may have gone wrong in the July 4th flooding in the Texas Hill Country.

The Texas Capitol building in Austin was partly evacuated on Tuesday amid an active shooter alert. Several state representatives and local media outlets posted videos from the scene, showing chaos. Officers could be seen escorting people off the campus.

A state lawmaker has refused to leave the Texas Capitol as Republicans use police to prevent Democrats from fleeing the state over a redistricting vote.

Rep. Nicole Collier is asking a Travis County district judge to rule that she’s allowed to leave the Texas Capitol. The Fort Worth Democrat has been confined to Texas Capitol since Monday after refusing to sign a “permission slip” turning her over to Texas Department of Public Safety custody for monitoring.