"抢先报道的新闻" can be translated into English as "breaking news" or "scoop" (when referring to a specific story that a news outlet has obtained and reported before others).
"Breaking news" is commonly used to describe news that is happening right now or has just occurred and is being reported immediately.
"Scoop" specifically refers to a piece of news that a particular news organization has managed to get and report before any other, implying exclusivity and timeliness.
For example:
"We were the first to break the story; it was a real scoop for our news organization."（我们第一个报道了这件事，这对我们新闻机构来说是个真正的独家新闻。）
"The network aired breaking news about the earthquake just minutes after it happened."（地震发生后仅几分钟，该电视台就播出了这条突发新闻。）