A century-old bridge in northern Baltimore County collapsed Monday night as a septic truck attempted to cross it. The cause remained under investigation Tuesday.

Baltimore County Fire officials received reports at around 5:20 p.m. Monday that the Carroll Road bridge in Phoenix had collapsed, said Travis Francis, a spokesperson for the department.

The bridge, located just north of the crossing of Carroll and Philpot roads, allows vehicles to pass over a stream that flows west into the Big Gunpowder Falls and ultimately the Loch Raven Reservoir.

No injuries or leaks were reported.

Officials with the Maryland Department of the Environment were at the scene of the bridge collapse to help investigate if the vehicle had leaked sewage into the stream beneath, Francis said.

Jay Apperson, an MDE spokesperson, said Monday evening that county crews were removing debris from a tree that fell onto the bridge and will need to get a crane to remove the sanitary truck. He said MDE crews will then go back to ensure there are no issues with the truck’s tanks.

“Presently there is no risk to the environment and there has been no release according to our units on location,” he said.

First built in 1879, the Carroll Road bridge is part of the Maryland Historical Trust’s Historic Bridge Inventory. The tributary below, known as Carroll Branch, can be seen from the popular Torrey C. Brown Rail Trail.

The metal truss bridge was part of a trend of similarly constructed bridges, of wrought iron and pinned connections, erected in the late 19th century in Baltimore County, according to the Maryland Historical Trust.

The story has been updated to clarify that Baltimore County Fire officials said Tuesday they were still investigating the cause of the collapse. Officials retracted a statement Monday that the septic truck caused the collapse.