IIT Bombay students are protesting a fee hike for postgraduate and PhD courses. The protest is a response to the increase in fees for these programs. According to the available evidence, the fee hike is the primary reason for the student protest. The Indian Express reports on the situation, but the article does not provide detailed information on the specific fee hike amounts or the exact reasons behind the increase. It is also unclear what specific demands the students are making or what actions the administration is taking to address the situation. The article simply states that students are protesting the fee hike, without providing further context or details.