By Daily Mail Reporter PUBLISHED: 10:28 EST, 29 January 2014 | UPDATED: 13:43 EST, 29 January 2014 A 300-year-old rare Stradivarius violin was stolen by a robber who used a taser on Milwaukee Symphony Orchestra's concertmaster to force him to drop the valuable instrument. Frank Almond, who had the $6 million violin on indefinite loan from a local family, was leaving a concert at Wisconsin Lutheran College when he was attacked at about 10.30pm on Monday. Police believe Mr Almond was targeted for the Lipinski Stradivarius, which has been owned by a string of prominent musicians since it was first crafted in 1715.
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Frank Almond was leaving a concert when he was attacked
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Interpol joins urgent search to find $6 million violin
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1715 instrument was on permanent loan to Almond from Milwaukee family
'The artistic heritage of @placeholder was assaulted and robbed last night,' Milwaukee Police Chief Edward Flynn said.