I just did and found that Baidu is the only one to censor all images related to the protests and massacre. Bing may filter out these images when used in China (I tried searching in Chinese with the browser set to request Chinese-language results, this did not affect the search results) but it does not seem to do so for me (Sweden, Linux, Firefox).
Baidu doesn't show anything relevant as expected, but Bing, Brave, Google and Yandex show similar results. Not overly graphic, but the photos are there.