A body trapped inside a pump station in Tijuana prevented a pump station from diverting sewage south. That caused more than 14 million gallons of sewage to spill across the U.S.-Mexico border over the weekend, federal officials said.

The spill started around 9 p.m. Sunday night and continued until 8 a.m. Monday morning, according to the International Boundary and Water Commission. The trans-boundary flows included treated and untreated sewage.