Why Indian players are wearing black armbands on Day 3 of the third Test against England?

It was a hugely improved bowling performance from India at the start of the third day of the ongoing third Test against England after the visitors were in the ascendency after two days of cricket at Rajkot's Niranjan Shah Stadium. Team India got two wickets quite early on the third day of the Test match and will have to continue taking them with no R Ashwin in the side. Kuldeep Yadav removed Ben Duckett later in the session to take India to the top. However, it was very peculiar to see all the Indian players sporting black armbands.

source https://www.indiatvnews.com/sports/cricket/ind-vs-eng-explained-why-indian-players-are-wearing-black-armbands-on-day-3-of-the-third-test-against-england-2024-02-17-917308