Today's meeting in Switzerland comes a week after 47 Senate Republicans signed an open letter to Iran suggesting any deal reached would lapse the day President Obama leaves office.
The St. Louis County Police Department announced the arrest on social media. A news conference announcing the details of the arrest was scheduled for 2:30 p.m.
The comments were made to CBS. The U.S. has previously said the Syrian leader "needs to go." But nearly four years into the Syrian civil war, there are few signs of that happening.
Durst, the troubled heir to a New York real estate fortune, has been questioned in the past over two deaths and a disappearance. It is unclear if his arrest is linked to those cases.
The attack is the latest in a series targeting the country's Christian minority. Irate protesters attacked people whom they suspected of being behind the explosions, killing at least one person.
Getting a ticket isn't all bad when it's in Farmington, N.H. Police Chief John Drury tells NPR's Rachel Martin that officers there are giving out pizza coupons for good behavior.