A Tampa Bay area sheriff says he hopes three fugitive siblings accused of shooting at a police officer in Florida and robbing a bank in Georgia will make a mistake as they continue eluding authorities.

Appearing on CBS's "The Early Show" Tuesday, Pasco County Sheriff Chris Nocco called the siblings "extremely dangerous" and said they wouldn't be afraid to "get into a battle with law enforcement."

A nationwide manhunt began Aug. 2 when the trio took off after firing shots at a police officer who tried to pull them over for speeding. Hours later, three people wearing masks robbed a bank in Valdosta, Ga., about 210 miles north.

Authorities say a white sedan similar to the one involved in the Florida shooting has been spotted in Georgia and Chattanooga, Tenn.