The magazine Der Spiegel reported that Brueckner, 49, got into a tussle with police outside a supermarket after taking photos of the officers with his mobile phone.
Drifting around Kiel, Christian Brueckner was in a belligerent mood last week, sneering at claims he might be extradited to the UK and made to answer questions about Madeleine McCann.
The convicted rapist, 48, is said to have been arrested alongside the Brit on suspicion of 'mutual assault' following a fight in the city of Kiel, northern Germany.
Convicted rapist and paedophile Christian Brueckner, 48, was named by German authorities as the person responsible for Madeleine's 2007 disappearance from Portugal six years ago.
Detectives from the Metropolitan Police are reportedly pushing for Christian Brueckner to stand trial in Britain for the abduction and murder of Madeleine McCann.
With German sex offender Christian Brueckner - the chief suspect in her disappearance - about to be released from jail, DEEP DIVE investigates how Maddie disappeared without a trace…
Brueckner , who was revealed as a suspect in the Maddie case in 2020 but never charged, was released from prison in Germany in September after serving a sentence on separate rape charges.