All the test results are actually negative, so that's very good news.

This is on the Senate side of the Capitol (building). At this time we have received negative results on this testing.

At approximately 6:30 pm (2330 GMT) this evening we received an alarm at the Capitol Police for a nerve agent in the attic of the Russell building.

Test results have been cleared and all test results are negative.

We are taking samples to our testing facilities. Subsequent tests have indicated it's not a nerve agent.