Looking for a website that archives old newspaper articles about deadly accidents/tragedies

It's a website I stumbled across at random a few years ago, I think it had a white or gray background. If I had to guess I'd say the articles were from before the 1950s and possibly as far back as the 19th century, but it very well may have also had more recent articles (I wouldn't have noticed, my interest is only pre-1950). I believe it was exclusively American, but could've had articles from other countries like England or Canada. It had a list of categories like "mill explosions", "mining disasters", "fires". It wasn't just big famous disasters; it also had articles about events like simple house fires.