I've been getting the exact same thing recently. I've also had it on various news websites. I inquired to my local newspaper about the issue and they said it was something with Google's ad service allowing through phishing ads designed to infect your device with a virus. They said that they can't control the ads Google displays on their website and Google won't fix it.
THIS is the exact reason I use ad blocker software on my laptop. I have no problem with reasonable ads to fund the site, but when this repeatedly occurs I have no other choice.