Published: Aug 08, 2011 4:09 PM EDT

ATLANTA (AP) - Investigators say they received a tip that three Florida siblings accused of firing shots at a Florida police car and then robbing a bank in south Georgia may have traveled to Tennessee.
    
Valdosta Police Commander Brian Childress says he received several leads over the weekend, including separate calls saying the siblings' vehicle was spotted near Forsyth, Ga. and Chattanooga, Tenn.
    
Childress said state and federal authorities are checking out the leads. The FBI did not immediately comment.
    
Authorities have been pursuing Ryan Edward Dougherty, Dylan Dougherty Stanley and Lee Grace Dougherty since Tuesday.
    
Sheriff Chris Nocco of Pasco County, Fla., says they are suspects in a high-speed chase in Florida in which at least 20 gunshots were fired at a police car. The officer wasn't hurt.

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