AUSTIN, Texas — The upper deck of I-35 southbound is currently closed because of an “active law enforcement” incident involving the Texas Department of Public Safety, according to the Austin Police Department.

The closure was announced shortly before 8 a.m. APD said the lower deck of the interstate would remain open to traffic.

The Texas Department of Transportation confirmed the incident is affecting the southbound side of I-35 near Airport Boulevard. The cause of the closure is described as “police activity.”

Details about the nature of the law enforcement incident were not immediately available. CBS Austin has reached out to APD and TxDPS for more information.

Police urged drivers to avoid the area and use alternate routes while the upper deck remains shut down.

This is a developing story and will be updated as more information becomes available.