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Three siblings accused of robbing Georgia bank, Fla. cop car shooting

The Dougherty siblings are accused of robbing a Georgia bank. WTSP

(CBS/AP) ATLANTA - Authorities are now hunting for three siblings who allegedly robbed a bank in southern Georgia and shot up a police car.

Arrest warrants were issued on Thursday for 21-year-old Ryan Edward Dougherty, 26-year-old Stanley Dylan Dougherty and 29-year-old Grace Lee E. Dougherty.

According to the FBI, the three armed suspects entered a bank in Valdosta, Ga. Tuesday, fired shots into the ceiling and demanded money.

Witnesses say one of the robbers appeared to be carrying an AK-47 type assault rifle while another had an automatic pistol. The third robber grabbed an undisclosed amount of money, and the trio left the bank in a white 2006 Subaru Impreza with New York license plate FBE-5900.

Earlier that morning, a police officer in Florida tried to pull the group over for speeding. Authorities say someone in the vehicle fired shots at the officer and then disabled his car. The officer was not injured and the vehicle got away.

Pasco Sheriff Chris Nocco said one of the suspects had sent a text message to their mother that said "...we all have to die," local station WTVT reported.

Authorities are also investigating whether the siblings are connected to gun parts found at Tampa International Airport Wednesday morning.