Michael Lohan claims his Twitter account was hacked this morning by a cyber-impostor -- someone who posted several horrible things about his daughter, Lindsay Lohan.
Earlier today, somebody went on Michael's Twitter page and posted several untrue statements postings which included, among other things, that Lindsay has HIV.
But Michael tells TMZ he NEVER posted those tweets -- and claims all of the hacked postings are blatant lies.
Lohan claims he's already contacted his lawyer -- in the hopes of tracking down the hacker.
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