News items are implemented as "posts" in the Jekyll template system. Each Jekyll post has its own file located at the _post directory with its file name named as YYYY-MM-DD-title.md. It must also have the preamble for posts as shown below:
---
layout: post
title: Post Title
---
See also the existing post files.
The list of all posts can be found at news.html. Additionally, the recent five news items are automatically linked from the top page.