Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Suicide bomber kills 30 in Pak ISLAMABAD, OCTOBER 1: A suicide bomber blew himself up inside a Shiite mosque packed with worshippers during Friday prayers killing at least 30 people and injuring 70 others in Sialkot, Pakistan.

World