News station WFSB is reporting that four attempted bomb attacks over three days have been thwarted by the Secret Service and others:

The bombs were found just two days after an explosive device was discovered in the mailbox of billionaire philanthropist George Soros, who frequently donates to liberal causes.

Official investigators told the Associated Press the attacks are linked. A DC law enforcement official told CNN the devices appear rudimentary but functional.

After the attack on Soros Tuesday, the following attacks happened Weds morning:

• Hillary Clinton
• Barack Obama
• Time Warner Center, home of CNN

The Secret Service statement (PDF) says two of the attacks were blocked because “routine mail screening procedures” that detects “potential explosive devices”. It does not mention processes that detected a bomb in the mail room of CNN.

The bomb attack at the New York residence of Soros has been described as hand-delivered.

…markings on the envelope were likely intended to make it appear as though the package was sent through the mail, though they believed it was not.

Related: “Trump links New York bomb attack to immigration debate”

“Today’s attempted mass murder attack in New York City … once again highlights the urgent need for Congress to enact legislative reforms to protect the American people,” Trump said in a statement.

[…]

It is not the first time that Trump has quickly seized on a terrorist attack, in this country or abroad, to argue for his … agenda. Yet the president’s reaction contrasts with his response after violence involving American nationals.