Police and firefighters are again on the scene at the Pentagon City Metro station for a hazardous materials situation.

Eight bottles filled with a cloudy, yellow liquid were found on both platforms at the station, according to scanner traffic. The situation mirrors an incident on Friday when 10 bottles filled with a yellow liquid were found on the platforms.

No word yet on what the substance might be. Citing an “ongoing investigation,” Metro spokesman Dan Stessel declined to divulge details.

“I can say that the substance in the previous incident was not harmful,” he said.

So far, the station has remained open during this morning’s investigation.

Update at 10:05 a.m. — The incident has been cleared and emergency responders are leaving the scene.