Complaints of a foul smell led San Antonio Water System authorities to discover a sewage spill of more than 100,000 gallons in a remote area off Rittiman and Gibbs Sprawl roads Friday.

Anne Hayden, spokeswoman for SAWS, said vandalism is the suspected cause, as workers found a manhole cover had been removed and several large rocks were blocking a line downstream.

A backhoe was used to remove enough of the pipe that the rocks could be removed, she said. The spill was contained, but cleanup continued.