Law enforcement officials in Florida on Wednesday issued an Amber Alert for two young boys who they said had been abducted by “anti-government” parents.

The Hillsborough County Sheriff’s Office said that 35-year-old Joshua Hakken tied up Patricia Hauser, the maternal grandmother of 4-year-old Cole Hakken and 2-year-old Chase Hakken, at around 6:30 a.m. Wednesday morning.

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Joshua Hakken took the boys and fled along with his wife, 34-year-old Sharyn Hakken, in Hauser’s 2009 silver Toyota Camry. They are suspected to be traveling in a 2006, black GMC Sierra with Florida tag number U95KT. The truck may also have been pulling a 2012 Forrest River pop-up camper.

“Both suspects are anti-government and have attempted a previous abduction at gunpoint in Louisiana,” a statement from the sheriff’s office warned. “Both subjects are considered armed and dangerous.”

Information about who had legal custody of the children was not immediately available. The Tampa Tribune reported that Joshua Hakken had been arrested in June 2012 on various drug charges, including “possession of a controlled dangerous substance in the presence of a minor.”

Authorities are urging anyone with information to call the Hillsborough County Sheriff’s Office at 813-247-8200 or dial 9-1-1.

Watch this video from WTSP, broadcast April 3, 2013.