Fateh (1991)

Ranvir, Karan, and Salim are military commandos under the command of Major Anand. One of their assignments results in apprehending arms-dealer and drug-smuggler, Munna, but things go wrong when Munna shoots at Anand, crippling him, and manages to escape, with a scarred face. Anand is forced to retire, dependent on a cane to assist him to walk, and opens a garage. Then the three commandos receive word that Anand has been shot dead, and all of them go to attend his funeral. They start making inquiries and find out that a gangster named Bablia may have been responsible for Anand's death, then they find out that Bablia was behind bars on the day that Anand was shot. The trio decide to stick around and find out who actually killed Anand, and why no one is coming forward to testify against the killer(s).