Former S.F. politico Ryan Chamberlain, wanted by the FBI for allegedly possessing explosive materials, was apprehended Monday evening after a brief, national manhunt that hopped from a bar in the Lower Haight to Crissy Field along San Francisco's northern waterfront.

An Uber driver who witnessed and filmed the arrest said Chamberlain was taken into custody at a cafe near Crissy Field. Earlier in the day, FBI agents had checked out Mad Dog in the Fog, a noted beer and soccer bar in the Lower Haight, where agents believed Chamberlain had been drinking there or at a bar in the neighborhood. Neighborhood business owner Devon Chulick told CBS5/KPIX that authorities believed Chamberlain used his ATM card at Mad Dog next door.

Morgan Manos, the Uber driver who witnessed the arrest, told the Chronicle Chamberlain "looked pretty surprised and frantic" during the arrest and was asking for help.

Earlier today, Chamberlain posted an apparent suicide note that was scheduled to post online ahead of time. He followed the posting with a frantic tweet:

Previously: Former SF Politico Wanted By FBI Appears To Have Posted Suicide Note Online
Nationwide Alert For S.F. Man Wanted By FBI For Possessing Explosives