A suspicious package addressed to President Trump was intercepted by the U.S. Secret Service on Monday, a new report says.

The Secret Service claim the suspicious envelope was not delivered to Trump and never entered the White House, according to media reports. The development comes as a series of suspicious packages has been sent to government and political offices this week.

Earlier Tuesday, the Pentagon announced that two suspicious envelopes mailed to the Pentagon tested positive for the deadly toxin ricin. The Pentagon has not reported that the substance caused anyone harm.

"On Monday, the Pentagon Force Protection Agency detected a suspicious substance during mail screening at the Pentagon's remote screening facility. The envelopes were taken by the FBI this morning for further analysis," said Col. Rob Manning, a Pentagon spokesman.

"All USPS mail received at the Pentagon mail screening facility yesterday is currently under quarantine and poses no threat to Pentagon personnel,” he said.

Additionally, several people were hospitalized on Tuesday after a package addressed to Sen. Ted Cruz’s campaign team containing a “white powdery substance” was opened at the campaign headquarters in Houston, Texas.

The office was evacuated, but the Houston Fire Department later said that the evacuation order was no longer in effect and “all tests were negative” for hazardous material.