HOUSTON For the second day in a row, federal investigators continued their search of a Tanglewood area home in the 400 block of Fall River Road near Memorial Drive.

At the same time, neighbors heard two explosions coming from the home. The first was around 2 p.m. and the second was around 4 p.m.

The Rosenberg family was at home on their computer when they heard the blasts.

I think we re all curious and obviously a little terrified, Robin Rosenberg said. I mean if the FBI is involved, it cannot be good.

A spokeswoman for the agency described the material found in the home as a potentially volatile substance, but would not say whether it was a powder or liquid they destroyed.

Earlier in the afternoon, agents went door to door before they destroyed the material on site.

For the safety of the nearby public, the nearby residences and our law enforcement personnel, we needed to dispose of that substance in the backyard of that residence, spokeswoman Shauna Dunlap said.

A neighbor told KHOU 11 News that authorities are investigating an online threat against the government.

Agents have not confirmed that.

Over the past two days the FBI has gone through three homes all connected to Andrew Schneck and Cecily Horton, a Houston couple.

No one has been charged or arrested in connection with the searches.

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