Hamilton police arrested a 41-year-old Port Elgin man on Tuesday, charging him with extortion and criminal harassment of a woman he'd met through an online dating site.

Police say the man, using an alias, sent thousands of text messages and emails to the woman between March 2015 and this month. He "threatened to ruin the victim's life," police say.

He told her he'd send personal information to her workplace, family and friends if she didn't talk with him.

Police detectives teamed up with tech crime specialists and the Saugeen Shores police to arrest the man and seize cell phones and computers.