https://support.microsoft.com/en-us/topic/advanced-search-keywords-ea595928-5d63-4a0b-9c6b-0b769865e78a

suggests that it is possible to limit to a particular site/URL, such as CNN. But searches like:

https://api.cognitive.microsoft.com/bing/v7.0/news/search?q=of&**url:cnn.com**&since=1646868728&sortBy=date&count=100&offset=1&textDecorations=false

https://api.cognitive.microsoft.com/bing/v7.0/news/search?q=of&**site:cnn.com**&since=1646868728&sortBy=date&count=100&offset=1&textDecorations=false (note: url:cnn.com or site:cnn.com)

are not limiting the results to CNN (or any specific website). Any suggestions?

(BTW, what I'm trying to do is to loop through a list of news websites and find articles from these websites from the previous 24 hours.)