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Alex Band -- lead singer of the rock band "The Calling" -- was abducted this weekend while taking a stroll down a street in Michigan, was beaten severely and then dumped on nearby train tracks ... and cops are investigating, sources tell TMZ.
Sources close to Alex tell us ... the singer was in Lapeer, MI for a music festival ... and decided to walk from his hotel to a nearby mini mart around 4am Sunday morning.
We're told ... during the stroll, a van pulled up alongside Alex and the people inside snatched the singer right off the street -- then proceeded to beat the crap out of him.
Eventually, sources say, the abductors dumped the badly beaten rocker on some nearby train tracks.
We're told ... another member of the band noticed 32-year-old Alex had gone missing later that morning and assembled a search party. The singer was discovered a short time later.
Alex survived the incident -- but his current condition is unclear.
Law enforcement wouldn't confirm the specific details ... but did tell us an incident report was filed ... and officials are currently investigating.
We reached out to Alex for comment -- but haven't heard back.
FYI -- The Calling was huge back in 2001, when they released that song "Wherever You Will Go" ... but broke up soon after. We're told the band had just recently reunited.
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