Conclusive tests are being run and the results will be announced in the next few hours, but a package found at a Las Vegas hotel may contain the deadly toxin Ricin:

A substance found at a motel may be the deadly toxin ricin, but authorities said Friday they don't believe it was intended for a terrorist attack. Lab tests on the substance were pending and seven people were taken to hospitals as a precaution.

"This event does not appear to be terrorism related," FBI spokesman Richard Kolko in Washington said Friday morning. Kolko said the FBI was assisting local police in the investigation.

Police were called to the Extended Stay America Motel on Thursday and retrieved a package from the motel manager that was determined to be a chemical or controlled substance, Officer Ramon Denby said. Two preliminary tests indicate it contained ricin, Denby said.

Results from further tests by the Centers for Disease Control and Prevention and a second local lab are expected later Friday, he said.

The man who brought the substance to the manager told police he found it in a suite and it did not belong to him, police Capt. Joseph Lombardo said at a news conference Thursday night. Lombardo did not identify the man.