All lanes of southbound Interstate 35W in downtown Minneapolis have reopened following a chemical spill that prompted lane and ramp closures earlier Tuesday.

A box truck leaking chlorine on southbound I-35W near 11th Avenue forced officials to shut down one lane of the freeway for about 40 minutes, said Bryan Tyner, assistant fire chief for the Minneapolis Fire Department.

The ramp leading from Washington Avenue to southbound I-35W was also closed.

Crews were called to the scene about 8:15 a.m. after a 50-gallon barrel of chlorine spilled. Some of the chlorine made its way into the sewer system before crews could put a dike around the spill to prevent more of the product from entering the system, Tyner said.

The spill was contained and the roadway was washed down by the Minnesota Department of Transportation before the freeway reopened.

No injuries were reported.